3. Predict Based On The Cooling Curve Data Above, Predict A Freezing Temperature Range For A Mixture (2024)

Chemistry High School

Answers

Answer 1

Based on the cooling curve data above freezing temperature range for a mixture containing 83% lead and 17% tin is solid lead - in other words, the lead starts to freeze at 250°C and tin having freeze at 183°C.

In what kind of a state would lead be at 250 degrees?

The temperature will eventually fall to a level where it crosses the line into the following area of the diagram. At that point, the mixture will begin to form some solid lead, meaning that the lead begins to freeze but not the tin. Around 250°C is the temperature at which that occurs.

From the cooling curve, one can infer the typical liquidus and solidus temperatures for each alloy. The tin lead temperature equilibrium Phase Diagram can then be used to determine the corresponding compositions of each alloy using this liquidus temperature.

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Related Questions

which of the following will increase the rate of dissociation of a solute in a solvent ? a. supersaturating the solution b. agitating the mixture c. saturating the solution d. all of the answers are correct

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the following will increase the rate of dissociation of a solute in a solvent B. agitating the mixture

A solvent is a substance that dissolves a solute, resulting in an answer. A solvent is often a liquid however can also be a stable, a fuel, or a supercritical fluid.

Solvents are a heterogeneous organization of structurally numerous chemical compounds that can be used to dilute, dissolve, or disperse different compounds. The potential of a solvent to dissolve some other molecule is dependent on molecular structure and physical homes of both the solvent and the solute.

Natural solvents and inorganic solvents are two kinds of solvents. Inorganic solvents don't include the detail carbon. The maximum commonplace inorganic solvents are water, and liquid ammonia while organic solvents, which includes alcohols, glycol ethers, contain carbon and oxygen of their shape.

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Agitating the mixture(Option B) will increase the rate of dissociation of a solute in a solvent.

A solution is a special kind of hom*ogeneous mixture of two or more substances. In such mixtures, a solute is a substance dissolved in another substance known as a solvent. If the attractive force between the solvent and solute particles is greater than the attractive force holding the solute particles together, the solvent particles will pull the solute particles apart and surround the solute particles. These enclosed solutes move away from the solid solutes and into the solution.

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the chromatogram below is an analysis of polyphenols in green tea. it is a reverse phase chromatography with uv detection. which compound is the most

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In laboratories, chromatography is used to separate or measure mixtures of organic substances.

It makes use of the polarity differences between molecules to achieve this, and the compounds are then categorised according to their affinity for the stationary phase.

The best method for routinely analysing and studying non-volatile tea ingredients at the moment is to use modern chromatographic techniques, such as high-performance liquid chromatography. Some mistakes in the more traditional analytical procedures could be found using these techniques.

In order to guarantee that chromatograms have appropriate levels of chromatographic quality, including proper peak shape, baseline drift, column bleed, sample carryover, and chromatographic resolution, chromatograms should be examined.

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what type of flame produces the greatest amount of heat? why? where is the hottest point of this type of flame?

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The hottest flame of them all, a blue flame, may reach temperatures of 1400–1650° Celsius (2600–3000° Fahrenheit). The yellow flame from a wax candle is substantially cooler than the blue gas flame of a Bunsen burner.

Gases burn hotter than organic materials like wood, therefore blue flames have more oxygen and become more intense. Natural gas burns quickly at a very high temperature when it is ignited in a bunsen burner, producing flames that are primarily blue.

The candle's blue flame, which has a temperature of 2552 degrees Fahrenheit, is actually the hottest component (1400° C.) Because of the high oxygen content of the flame there, full combustion occurs. At 1472° F, the coolest area is the reddish portion (800° C). The visible light spectrum ranges from red, which has the lowest energy, to orange, yellow, green, blue, indigo, and violet, which has the highest energy. The energy of a photon influences its hue. Red light has the lowest energy.

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how many different e2 products are expected in the reaction of 3-bromo-1,1-dimethylcyclohexane with naoch2ch3?

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2 different E2 products are expected in the reaction of 3-Bromo-1,1-dimethyl cyclohexane with NaOCH₂CH₃.

It's a one-step mechanism called an E2 elimination that deals with bimolecular elimination. The bonds between carbon and hydrogen and carbon and halogen generally separate at this point to create a new double bond. A base, on the other hand, is a crucial component of the rate-determining step in the E2 mechanism and it greatly affects the process. Counting the steps in the mechanism is the most straightforward approach to tell E1 from E2 in a system. In contrast to E2, which occurs in a single step without an intermediate step, E1 involves two stages and a carbocation intermediate. In a syn elimination reaction, the base attacks the -hydrogen from the same side as the leaving group. The β-hydrogen on the other side of the departing group is attacked by the base in anti-elimination. Experimental research has shown that an anti mechanism is involved in the removal of E2.

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a balloon contains 0.76 mol n2, 0.18 mol o2, 0.031 mol he and 0.026 mol at 739 mm hg. what is the partial pressure of o2?

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Assume that every gas in the list will act perfectly. Using the mole fraction of O2 and the specified pressure, the partial pressure of O2 may be computed (P).

What is specified?

The following diagram illustrates the mathematical link between partial pressure of oxygen (P1) and oxygen mole fraction (X1):

P₁=X₁P

By dividing the total number of moles of gases (0.76 + 0.18 + 0.031 + 0.026) by the number of moles of O2 (0.18 mol), it is possible to determine the mole fraction of O2 as follows:

X₁= 0.18 / (0.76+0.18+0.031+0.026)= 0.1805

In this manner, the partial pressure of O2 (P1) is determined:

P1=0.1805x739mmHg, or 133.4mmHg

According to the estimate above, the partial pressure of oxygen is almost equal to 130 mm Hg. As a result, option C is the best one.

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Which of the following compounds is insoluble in water?
O NH4Cl
O KCI
O CoCl2
O PbCl2
O Lici

Answers

the compounds is insoluble in water is O PbCl2 .

Why are some substances water insoluble?

Not every substance dissolves easily in water.Some ionic substances, including silver chloride (AgCl) and calcium carbonate (CaCO3), are almost insoluble.This is so because there is a stronger attraction between the ions inside the crystal lattice than there is between the water molecules and the ions.

What doesn't dissolve in water?

Explanation: A substance is generally considered to be "insoluble" if it does not dissolve into water.Sand, lipids, wood, metals, & plastic are a few examples.They would not dissolve when we attempt to mix them with water.

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what type of amino acids has hydrophilic side chains that are attracted to water? what type of amino acids has hydrophilic side chains that are attracted to water? hydrophobic polar aromatic hydrocarbon nonpolar

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The amino acids with hydrophilic side chains that are attracted to water are polar amino acids.

Polar amino acids have side chains that contain electrically charged or hydrogen-bonding functional groups, such as hydroxyl, carboxyl or amino groups. The presence of these groups causes the side chain to be attracted to water molecules.

This makes the side chain more hydrophilic than nonpolar amino acids, which have side chains that are mainly composed of hydrocarbon groups. Examples of polar amino acids include aspartic acid, glutamic acid, tyrosine, and lysine.

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explain how scientists have used the concept of metallic bonding to account for many of the physical properties of metals, such as electrical conductivity and malleability

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Metallic bonds are formed when free-floating valence electrons attract positively charged metal ions. An electric current is indeed the electrons that move. As charged particles access each end of a metal piece,

Some free-floating electrons escape from the other end. As a result, metals are excellent electrical conductors. The free electrons protect the cations in a piece of metal from each other. As a result, when the metal is struck, the cations easily slide past each other. As a result, the metal becomes malleable and ductile. The term "metallic bond" describes the collective taking the time to share of a sea of valence electrons by several positive-charged metal ions.

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for the following equation fe(s) 2 hcl (aq) ---> h2 (g) fecl2 (aq) if 20 grams of fe reacts with 4000 ml of a 0.1 m solution of hcl, what will the volume of the h2 gas be if it has a pressure of 0.5 atm and a temperature of 250 k?

Answers

The volume of the H₂ gas is 8.21 L, which is solved by using the ideal gas equation.

What is Ideal gas?

A theoretical gas known as an ideal gas is made up of several randomly moving point particles with no interparticle interactions. Because it abides by the ideal gas law, a condensed equation of state, and is amenable to statistical mechanics analysis, the ideal gas concept is helpful.

Calculation:

For a given reaction,

mass of Fe = 20 grams

moles of Fe = 0.3581 mol.

Moles of Hcl can be calculated as = volume × M

= 4000ml × 0.1

= 4L × 0.1

= 0.4 mol.

2 moles of acid will produce 1 mole of H₂ gas by reacting with the metal

if 0.4 mol of HCl reacted, it produce 0.2 mol H₂ gas

given that,

p = 0.5 atm

T = 250K

R = 0.0821

n = 0.2

V =?

substituting the given value in the ideal gas equation:

pV =nRT

V= (n/p)× R T

V = (0.2 mol/0.5atm) × 0.0821L.atm.mol⁻¹K⁻¹ × 250K

V = 8.21 L

Hence, the volume of the H₂ gas is 8.21 L, which is solved by using the ideal gas equation.

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whether a substance is a gas, liquid, or solid is dependent on the natural attractive forces between molecules and the collisions between the molecules. the kinetic energy of the molecules. how the molecules collide with the container. the extent of molecular motion as determined by the average ke and temperature.

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Answer:

Correct! The state of a substance (whether it is a gas, liquid, or solid) is determined by the balance between the attractive forces between its molecules and the kinetic energy of its molecules.

Explanation:

The attractive forces between molecules can be either strong (as in solids) or weak (as in gases). When the attractive forces between molecules are strong, the molecules are relatively close together and are unable to move freely past one another. As a result, solids have a fixed shape and volume.

On the other hand, when the attractive forces between molecules are weak, the molecules are able to move more freely past one another. As a result, gases have a relatively low density and are able to expand to fill their container.

The kinetic energy of the molecules refers to the energy of motion of the molecules. At higher temperatures, the molecules of a substance have more kinetic energy and are able to move more quickly. This can cause the substance to change state from a solid to a liquid or from a liquid to a gas, depending on the temperature and the attractive forces between the molecules.

The collisions between the molecules of a substance and the container also play a role in determining the state of the substance. When the molecules collide with the walls of the container, they exert a force on the walls. If the force is strong enough, it can cause the substance to change state. For example, if the temperature and pressure of a gas are increased to the point where the force of the molecule collisions with the container becomes strong enough, the gas may condense into a liquid.

Finally, the extent of molecular motion as determined by the average kinetic energy and temperature of the substance can also affect the state of the substance. At higher temperatures, the molecules of a substance will have a higher average kinetic energy and will be able to move more freely. This can cause the substance to change state from a solid to a liquid or from a liquid to a gas, depending on the temperature and the attractive forces between the molecules.

The atomic radius of atoms increases in groups of elements on the Periodic Table of the Elements. The graph shows Group 1 elements and their atomic radii.Which best describes what tends to occur in groups that results in an increase in atomic radius?A. The elements transition from gases to liquids to solids.B. The attraction between the nucleus and electrons decreases.C. The size of the nucleus increases, forcing electrons outward.D. The repulsion between electrons outside the nucleus decreases.

Answers

The atomic radius of atoms increases in groups of elements on the Periodic Table of the Elements. The graph shows Group 1 elements and their atomic radii, B . The attraction between the nucleus and electrons decreases shows Group 1 elements and their atomic radii.

The force of interaction between the nucleus and the valence electrons decreases as the atom's size decreases. In genomics, a nucleus is indeed the lattice organelle within a cell that holds the chromosomes. The nuclear membrane's array of holes, or porosities, means allowing for the preferential passing of certain atoms (such as proteins and nucleic acids) to and from the nucleus. An electron is a negative charges elementary particle that may be bound to or free from an atom (not bound). A bound electron is one of 3 main kinds of particles inside an atom, the other two being protons and neutrons. The core of an atom is made up of electrons, protons, and neutrons.

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Which of the following are chemical properties?
I.combustibility
II.conductivity
III.density
IV.reactivity
V.solubility
VI.viscosity

Answers

Answer:

All of the above are chemical properties

a 150.0 g sample of a metal at 75.0 oc is added to 150.0 g h2o at 15.0 oc . the temperature of the water rises to 18.3 oc . calculate the specific heat capacity of the metal, assuming that all the heat lost by the metal is gained by the water.

Answers

The specific heat capacity of the metal, assuming that all the heat lost by the metal is gained by the water is 0.24 J / g °C.

given that :

mass of metal = 150 g

mass of water = 150 g

initial temperature of metal = 75 °C

initial temperature of water = 15 °C

final temperature is same for both = 18.3 °C

the specific heat capacity is given by :

Q lost = - Q gained

Q metal = - Q water

m c ΔT = m c ΔT

150 × cmetal × ( 75 - 18.3 ) = - 150 × 4.12 × ( 15 - 18.3 )

c metal = 0.24 J / g °C

Thus, the specific heat capacity of the metal is 0.24 J / g °C.

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17.85 ml of nitric acid neutralizes 25.00 ml of 0.150 mol/l naoh(aq). what is the concentration of the nitric acid?

Answers

The concentration of nitric acid is 0.210 mol/L.

What is neutralization reaction?

A neutralization reaction occurs when an acid and a base react to make water and a salt through the interaction of H+ ions and OH- ions. In this type of reaction, equal amount of acid and base react with each other to give the product.

According to this question:

[tex]NaOH (aq) + HNO_3 (aq)[/tex] → [tex]NaNO_3 (aq) + H_2O (l)[/tex]

Given,

Concentration of NaOH = 0.150 mol/L

Volume of NaOH = 25 ml = 0.025 L

Moles = concentration x volume

= (0.150 mol/L)(0.025 L)

= 0.00375 mol

According to reaction,

[tex]NaOH (aq) + HNO_3 (aq)[/tex] → [tex]NaNO_3 (aq) + H_2O (l)[/tex]

Moles of NaOH = moles of HNO3 = 0.00375 mol

Volume of HNO3 = 17.85 ml = 0.01785 L

Concentration = moles/volume (L)

= (0.00375 mol)/(0.01785 L)

= 0.210 mol/L

The concentration of nitric acid is 0.210 mol/L.

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propane (ch3ch2ch3) have a higher or lower enthalpy of vaporization than ethanol? explain your answer.

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propane (ch3ch2ch3) have a higher enthalpy of vaporization than ethanol.

While propane solely produces hydrogen bonds, ethanol generates links between hydrogen and oxygen molecules. Since hydrogen bonds are weaker than hydro-oxi bonds, it requires more heat to destroy H-H bonds than H-O bonds.The three-carbon alkane propane has the chemical formula C3H8. At room temperature and pressure, it is a gas, but it may be compressed into a liquid for transportation. It is a by-product of the processing of natural gas and the refining of petroleum and is frequently utilised as a fuel in home, commercial, and low-emission transportation systems.

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a hypothetical radioactive isotope has a half-life of 100,000 years. if the ratio of radioactive parent to stable daughter product is 1:7, how old is the rock containing the radioactive material? (unit can't be included, so give number that would match the unit of years)

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A hypothetical radioactive isotope has a half-life of 100,000 years. if the ratio of radioactive parent to stable daughter product is 1:7, the rock containing the radioactive material old is 3 × 10⁵ .

given that , ratio of radioactive parent to stable daughter product is 1:7.

No / N = 1/ 1+ 7

therefore , N / No = 1 / 8

the half-life = 1 × 10⁵ yrs

by using the expression give as :

0.693 / 1 × 10⁵ t = 2.303 log No / N

0.693 / 1 × 10⁵ t = 2.302 log 8

0.693 t = 2.303 × 0.903 × 10⁵

0.693 t = 2.079 × 10⁵

t = (2.079 / 0.693 ) × 10⁵

t = 3 × 10⁵ yr old.

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to determine the pressure of a gas collected over water, you must use which law?

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Dalton's Law tells us that the pressure of a gas collected over water will be a sum of the pressure of the gas collected and the water vapor.

The total pressure exerted by a gas mixture is equitable to the sum of the partial pressures of the constituent gases, thus according Dalton's legislation of partial pressures. The partial pressure is defined as the maximum stress that each gas will indeed exert if it inhabited the same volume of the combination by itself at the same temperature. Partial pressure is defined as the force exerted by each gas in a watertight container with more than one gas. The pressure of any gas enclosed within the jar is alluded to as its partial pressure.

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calculate the percentage change in kx for the reaction h2co(g) 5 co(g) h2(g) when the total pressure is increased from 1.0 bar to 2.0 bar at constant temperature.

Answers

The percentage change in Kx is calculated using the following equation: Kx2/Kx1 x 100%.

What is pressure?

Pressure is a physical quantity that expresses the magnitude of a force per unit area. It is often referred to as the ‘force per unit area’ or the ‘intensity of the force’. Pressure is measured in various units, including pounds per square inch (psi), atmospheres (atm), and pascals (Pa). Pressure can be applied to a variety of substances, such as liquids, gases, and solids.

The value of Kx1 is the equilibrium constant at 1.0 bar and Kx2 is the equilibrium constant at 2.0 bar. Using the ideal gas law, we can calculate the partial pressures of each species at each pressure, substitute those into the equilibrium expression, and use the appropriate constants to solve for the equilibrium constants. Then, we can divide Kx2 by Kx1 and multiply by 100% to find the percentage change in Kx.

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when mixing two ointments together while following a master formula, you notice small white lumps in the mixture. the term for this would be

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When mixing two ointments together while following a master formula, you notice small white lumps in the mixture, it is called emulsification.

What is emulsification?

Emulsification is the process of dispersing two or more immiscible liquids together to form a semi-stable mixture.

What is a white lump?

Lumps occur when two similar or non-similar substances are mixed together.

When mixing happens, stabilizers can form a gelling surface around powder particles. The gelled surface prevents the liquid from fully wetting the powder and causes the powder to lump.

The lumping reduces:

1) stability of the product

2) lead to sedimentation

3) clogging in the mixture

4) reduces production quality

When mixing two ointments together while following a master formula, you notice small white lumps in the mixture, it is called emulsification.

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if a monocyclic alkane hydrocarbon contains n carbon atoms, how many hydrogen atoms must it also contain?

Answers

The monocyclic alkane hydrocarbon must contain (n * 2 + 2) hydrogen atoms.

What is hydrogen atom?

Hydrogen atoms are the smallest and lightest atoms in the universe. They consist of one proton and one electron and have a single electron shell. Hydrogen atoms are commonly found in molecules like water, where two hydrogen atoms are bonded to one oxygen atom. Hydrogen atoms are also the most abundant element in the universe, making up about 75% of the total mass.

This is because each carbon atom in the hydrocarbon is connected to two hydrogen atoms in a single covalent bond. Therefore, if the hydrocarbon contains n carbon atoms, it must also contain (n * 2 + 2) hydrogen atoms. Furthermore, since every covalent bond consists of two atoms, the total number of atoms in the hydrocarbon is equal to (n * 2 + 2) + n = (n * 3 + 2). This number is equal to the sum of the total number of carbon atoms and hydrogen atoms in the hydrocarbon.

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what is the active ingredient in the synthesized sunscreen? does the active ingredient in the synthesized sunscreen protect against uv-a, uv-b, or both? is the active ingredient a physical or chemical agent?

Answers

The active ingredient synthesized in sunscreen is zinc. The active ingredient in the synthesized sunscreen protects against UV-A, and UV-B. It is a physical agent.

The active elements in chemical sunscreens encompass avobenzone, octinoxate and oxybenzone. Physical sunblock sits on pinnacle of the pores and skin and displays the sun's rays. The minerals titanium dioxide and zinc oxide are the primary lively elements in bodily blocks. Zinc oxide is the best unmarried lively element that gives extraordinary safety from UVA and UVB rays. When the use of zinc oxide in a sunscreen no different lively elements are needed.

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a solution contains 1.569 mg of coso4 (155.0 g/mol) per milliliter. calculate a. the volume of 0.007840 m edta needed to titrate a 25.00 ml aliquot of this solution. b. the volume of 0.009275 m zn2 needed to titrate the excess reagent after addition of 50.00 ml of 0.007840 m edta to a 25 ml aliquot of this solution

Answers

Volume of EDTA needed is [tex]32.28ml[/tex] and Volume of [tex]Zn^{+2}[/tex] needed to titrate the excess reagent is [tex]14.9796ml[/tex].

Titration-a procedure or method for calculating the concentration of a dissolved substance using the least amount of reagent at a certain concentration needed to get a specific result when combined with a known volume of the test solution.

concentration refers to the amount of a substance in a defined space. Another definition is that concentration is the ratio of solute in a solution to either solvent or total solution.

Concentration of [tex]Co^{+2}[/tex]=[tex](\frac{1.569\times10^{-3} }{155} )\times(\frac{1000}{1} )=0.0101226M[/tex]

[tex]M_{1}V_{1} =M_{2}V_{2}[/tex]

[tex]V_{1}=\frac{0.0101226M\times25ml}{0.007840M}[/tex]

[tex]V_{1}=32.2786ml[/tex]

Volume of EDTA needed is[tex]32.28ml[/tex]

millimoles of EDTA taken = [tex]0.007840M\times 50.00ml = 0.392mmol[/tex]

millimoles of [tex]CO^{+2}[/tex] in the sample is [tex]0.0101226M\times25.00ml = 0.25306mmol[/tex]

millimoles of EDTA(excess)=[tex]0.392 - 0.25306 = 0.138935mmol[/tex]= millimoles of [tex]Zn^{+2}[/tex] reacted

Volume of [tex]Zn^{+2}[/tex] needed = [tex]\frac{0.138835mmol}{0.009275M } = 14.9796\:ml[/tex]

Volume of [tex]Zn^{+2}[/tex] needed to titrate the excess reagent[tex]=14.9796ml[/tex]

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rusting is the common name for the corrosion of iron or steel. the brown-orange rust commonly seen on iron or steel cars, nails, chains, or posts has the formula fe2o3. what is its iupac name?

Answers

Rust is known as Iron (III) Oxide according to the IUPAC, and its chemical formula is Fe2O3.

What is the rusting of iron called?

Iron rusting is a chemical change since it involves the interaction of two substances to create a new one. Iron oxide is created during the rusting process by the reaction of iron and oxygen molecules.

Rust is described as the reddish brown layer that frequently develops on particular kinds of metal. These metals rust when they are exposed to air and moisture. The red material is created as a result of this combination's chemical reaction.

Rust's scientific name is iron oxide; its chemical formula is [tex]$${Fe_2O_3}[/tex]. Metals that rust are those made of iron or iron alloys like steel. A chemical reaction takes place over time when iron comes into touch with airborne oxygen and water. This reaction creates iron oxide as a new chemical. The reddish hue of Mars is due to the abundance of iron oxide, which is present in nature and also on Mars.

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Closely examine the diagram representing the positron emission of carbon-11 and identify the missing nucleus.

A nucleus consisting of six protons and five neutrons decays into a positron plus a question mark.

Express your answer as an isotope.

Answers

By finding the total mass and atomic number on the left side of the equation, it was possible to identify the missing nuclide.

The missing nuclide: where can I find it?

The mass number and atomic number of the helium atom will then be determined by deducting them from the total to determine the mass number and atomic number of the missing nuclide.

Which kind of degradation does carbon-11 experience?

Background. With a short half-life of 20.4 minutes, carbon-11 is an unstable isotope. This radioisotope decays to stable boron-11 mostly through positron emission (99.79%) and to a very small proportion through electron capture (0.21%).

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hydrogen and helium are the only elements in the first row of the periodic table. what characteristic(s) do they share that determine(s) their position?

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They have only one electron shell characteristic(s) they share that determine(s) their position, hydrogen and helium are the only elements in the first row of the periodic table.

The electron is a subatomic particle because it has an elementary electric charge that is negative. Electrons, the first generation of the lepton family of particles, are usually considered to be elementary particles due to their lack of components or substructure.Many physical processes, such as gravity, electromagnetic interactions, weak interactions, electricity, magnetism, chemistry, and thermal conductivity, depend on electrons.The atomic number of an element is equal to the number of electrons present in an atom for neutrally charged species. This shows that an element has the same number of protons and electrons as other elements. Consequently, oxygen has 8 electrons.Charge, spin, and orbital angular momentum are the three primary properties of an electron in an atom. The latter term defines the

hydrogen and helium are the only elements in the first row of the periodic table. what characteristic(s) do they share that determine(s) their position?

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the following reaction: nh4no3 (s) h2o (l) ----> nh4no3 (aq) is extremely endothermic (it is used by injured athletes in cold packs), yet the solid ammonium nitrate dissolves in water spontaneously. explain this observation.

Answers

The dissolution of ammonium nitrate is a endothermic process and it is spontaneous process.

The reaction for dissolution of Ammonia is,

NH4NO3 (s) + H2O (l) ----> NH4NO3 (aq.)

The dissolution of ammonium nitrate need higher energy uptake and thereby it is an endothermic process. For an endothermic process the enthalpy will be positive. Yet the process of dissolution is spontaneous means the gibbs energy is negative because the entropy of ammonium nitrate ions is largely positive. The entropy change of water molecules is negative but the entropy change of the ions predominates and the entropy of the system gets increased. That's make the process spontaneous.

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select true or false: h3po4 is a weak electrolyte. group startstrue or falsetrue, selectedfalse, unselected

Answers

1. True H3PO4 is stronger acid as its PKA value is 2.12 rather than H3AsO4 whose PKA value is 2.30

2. False HBr is a stronger acid than H2Se.

Phosphoric acid (orthophosphoric acid, monophosphoric acid, or phosphoric(V) acid) is an inorganic phosphorus-containing solid having the chemical formula H3PO4. It is most usually encountered in the form of an 85% aqueous solution, which is a colorless, odorless, non-volatile syrupy liquid. It is a significant industrial chemical that is found in many fertilizers. The substance is an acid. When all three H+ ions are removed, the phosphate ion is formed. When one or two protons are removed, the dihydrogen phosphate ion H2PO and the hydrogen phosphate ion HPO are formed. Phosphoric acid produces esters known as organophosphates.

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What is the physical phase of the substance at t = 100 k and p = 0.1 atm?

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C2H2 is the physical phase of the substance at t= 100k and p=0.1 atm.

A phase, in the physical phase , is a region of space where a material's physical properties are all essentially uniform. Physical characteristics include things like density, index of refraction, magnetism, and chemical composition. to select specific technological breakthroughs to support the data security outline. A SecSDLC will provide a thorough, reiterable, and predictable technique for integrating security into your application development process. It will involve defining requirements, designing the application, developing and testing the application, moving the application into production, and maintaining the application as it is being used.

What is the physical phase of the substance at t = 100 k and p = 0.1 atm?

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Nitrogen gas (n2) can react with hydrogen gas (h2) to produce ammonia (nh3). If one starts with 6 moles of nitrogen gas, and 15 moles of hydrogen gas, and the reaction goes to completion, how many moles of ammonia can be produced?.

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The number of moles of ammonia that can be produced is as follows: the first step is to balance the chemical equation followed by calculating the moles.

The balanced chemical equation is

N2+3H2----> 2NH3

No. of moles of N2=6

No. of moles of NH3= 6X 2moles of NH3/1 mole of N2

=12 moles of NH3

The SI unit of substance amount is the mole, abbreviated as mol. The definition of a mole is 6.02214076 x 1023 elementary entities (atoms, molecules, ions or electrons). The Avogadro number was selected to ensure that the mass of a mole of a chemical compound in grams is numerically equal, for the majority of practical purposes, to the average mass of one molecule of the compound in daltons and roughly equivalent to the number of nucleons (protons or neutrons) in the molecule.

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draw the carbon‑containing products of the fatty acid after one repetition of the β‑oxidation pathway. include the hydrogen atoms in your structures.

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In the beta- oxidation pathway, the fatty acid diffuses to the mitochondrial membrane where it is combined with carnitine.

The Beta-oxidation pathway is the process by which fatty acids are broken down into smaller fragments with the release of energy with each repetition of beta-oxidation one acetyl CoA is released from the fatty acid carbon chain. Fatty acid oxidation is initiated on the outer mitochondrial membrane. The activation is catalyzed by acyl-CoA synthetase. For each molecule of fatty acid activated, one molecule of coenzyme A and one molecule of adenosine triphosphate (ATP) are used, equaling a net utilization of the two high-energy bonds in one ATP molecule. The fatty acyl-CoA diffuses to the inner mitochondrial membrane, where it combines with a carrier molecule known as carnitine in a reaction catalyzed by carnitine acyltransferase.

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3. Predict Based On The Cooling Curve Data Above, Predict A Freezing Temperature Range For A Mixture (2024)

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