In the following experiment, a coffee-cup calorimeter containing 100 mL
of H2O is used. The initial temperature of the calorimeter is 23.0 ∘C
. If 6.60 g of CaCl2 is added to the calorimeter, what will be the final temperature of the solution in the calorimeter? The heat of solution ΔHsoln of CaCl2 is −82.8 kJ/mol
.
Assume that the specific heat of the solution formed in the calorimeter is the same as that for pure water: Cs=4.184 J/g⋅∘C
.

Express your answer with the appropriate units.

Answers

Answer 1

In the following experiment, a coffee-cup calorimeter containing 100 mL of [tex]H_{ 2} O[/tex] is used. The initial temperature of the calorimeter is 23.0 ∘C. If 6.60 g of [tex]CaCl_{2}[/tex] is added to the calorimeter, Final temperature of the solution in the calorimeter = 11.

The first step in solving this problem is to calculate the number of moles of [tex]CaCl_{2}\\[/tex] added to the calorimeter.

Moles of [tex]CaCl_{2}[/tex] = mass of [tex]CaCl_{2}[/tex] / molar mass of [tex]CaCl_{2}[/tex]

Moles of[tex]CaCl_{2}[/tex] = 6.60 g / 110.98 g/mol (molar mass of [tex]CaCl_{2}[/tex]

Moles of[tex]CaCl_{2}[/tex] = 0.0594 mol

We can use the equation for heat transfer to find the change in temperature of the solution. q = mCsΔT, where q is the heat transferred, m is the mass of the solution, Cs is the specific heat of the solution, and ΔT is the change in temperature.

We know that the initial temperature of the calorimeter is 23.0 ∘C and the mass of the solution is 100 g (since the density of water is 1 g/mL). We can solve for ΔT: ΔT = q / mCs

To find q, we can use the enthalpy change of solution (ΔHsoln) and the number of moles of[tex]CaCl_{2}[/tex]added: q = ΔHsoln x moles of[tex]CaCl_{2}[/tex]

q = -82.8 kJ/mol x 0.0594 mol

q = -4.92 kJ

Now we can solve for ΔT: ΔT = (-4.92 kJ) / (100 g x 4.184 J/g⋅∘C)

ΔT = -11.8 ∘C

We can find the final temperature of the solution by adding the change in temperature to the initial temperature: Final temperature = 23.0 ∘C - 11.8 ∘C =11 ∘C.

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Related Questions

What are the major product(s) formed by treating 1,2-dimethyl cyclopentene with Br2?

Answers

The major product(s) formed by treating 1,2-dimethyl cyclopentene with Br₂ reaction is attached below.

Dimethyl cyclopentane: what is it?

Cycloalkanes include 1,2-dimethylcyclopentane.The liquid cyclopentene has no color. Water insoluble and less dense than water.

The chemical compound cyclopentene has the formula (CH2)3(CH)2. It has an odour similar to that of gasoline and is colourless. Since it has few uses, gasoline typically contains concentrations of less than 1% of it, making it a minor component. One of the main cycloalkenes is it.

The polyurethane foams used to insulate refrigerators and freezers use cyclopentane as a blowing agent. Cyclopentane does not contain hydro-fluorocarbons, in contrast to some other materials used to insulate refrigerators (HFCs). Equivalent CO2 emissions are significantly reduced when cyclopentane is used.

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How many milliliters of 2.0M NaCI must you dilute to make 250ml of 0.5M NaCI?

Answers

Answer:

Using the dilution equation, we can solve for the initial volume required. We need 18.75 mL of 2.0 M NaCl solution.

Explanation:

Which of the following elements would have six electrons in its valence enegy level?

Answers

Oxygen is in group 6 and has 6 valence electrons.

What is meant by electrons?

Due to their lack of components or substructure, electrons, which are part of the lepton particle family's first generation, are typically regarded to be elementary particles.Since electrons are fermions, the Pauli exclusion principle states that no two electrons may be in the same quantum state.Since they can collide with other particles and can be diffracted like light, electrons, like all primary particles, display both wave and particle characteristics. Because electrons have a lower mass and a longer de Broglie wavelength for a given energy, their wave properties are simpler to observe experimentally than those of other particles like neutrons and protons.

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If methyl alcohol boils at 84 %H, what is its boiling point on the Jekyll scale? Express your answer using two significant figures

Answers

Methyl alcohol boils at 84 %H, the boiling point of methyl alcohol on the Jekyll scale is -188 %H.

The Jekyll scale is a temperature scale used to express the boiling points of liquids in terms of the percentage of sulfuric acid required to lower the boiling point of the liquid to that of water.

To convert from the boiling point in degrees Celsius to the Jekyll scale, we use the following formula:

= %H

= (100 - 4.6 * (boiling point in °C - 20))

So to convert 84 °C to the Jekyll scale, we can substitute into the above formula:

= %H

= (100 - 4.6 * (84 - 20))

= (100 - 4.6 * 64)

= (100 - 288)

= -188%H

So, the boiling point of methyl alcohol on the Jekyll scale is -188 %H.

It's worth noting that the Jekyll scale is rarely used today, and it's mostly used in historical context.

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how many different ways are there to arrange 5 quanta among 5 atoms in a solid?

Answers

The atoms in a solid are tightly bound to each other

What exactly are the atoms of a solid?

Each kind of bonding necessitates the use of valence electrons; also, the nature of the bond is determined by the electron configurations of the constituent atoms. A solid’s atoms are closely bonded to one another, either in a regular geometric lattice (crystalline solids, which include metals and typical ice) or in an irregular lattice (an amorphous solid such as common window glass).

Atoms are the fundamental building components of matter. Protons, neutrons, and electrons are subatomic particles that make up an atom. Protons and neutrons are found in an atom’s nucleus, whereas electrons are found outside of the nucleus.

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2Al + 3CuCl2 = 2AlCl3 + 3Cu (copper (ii) chloride + aluminum = aluminum chloride + copper) Examine your balanced equation. So if you had 0.26 moles of Aluminum foil, then how many exact moles of copper (II) chloride would be needed for stoichiometry

Answers

Answer: .39 Moles would be needed.

Explanation: The mole-to-mole ratio of Copper (ll) chloride to Al is 3/2. We can tell by looking at the coefficients of the reactants. Al has a coefficient of 2 and CuCl2 has a coefficient of 3. The ratio of CuCl2 to Al is 3:2 or 3/2. We multiply this ratio by the number of moles of Al which .26 to find how much we need of CuCl2. Now figure out how many moles of AlCl3 you would produce from .26 moles of Al.

The higher the temperature of water, the faster an egg will boil.

Answers

Answer:

This is true

Explanation:

Which of the following statements is least likely to be true of a sample of nitrogen gas at STP?

Answers

Nitrogen molecules interact with one another through strong forces.

Why are they known as intermolecular forces?

Individual molecules of a material interact with one another through the mediation of these forces. Most of the physical and chemical features of matter are caused by intermolecular forces. The phrase "intermolecular forces" refers to the forces that exist between the molecules themselves.

Intermolecular force is the attraction between two atoms or molecules that causes them to join together to create a molecule or other substance. In essence, it has a beautiful nature. It also affects atoms and ions.

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In terms of binding energy per nucleon, what element divides fission and fusion processes? He U Fe C H

Answers

In terms of binding energy per nucleon,  Fe element divides fission and fusion processes.

What is binding energy per nucleon?The bare minimal amount of energy needed to separate an atom's nucleus into its component protons and neutrons—collectively referred to as nucleons—is known as the nuclear binding energy in experimental physics. The binding energy is the quantity of energy produced when a nucleus forms. The term "binding energy per nucleon" refers to the typical amount of energy needed to remove a nucleon from a nucleus. It is possible to quantify the forces holding the nucleons together using this energy. In order for the nucleus to split into individual nucleons, energy must be replenished from the outside environment. For instance, a deuterium atom has a mass defect of 0.0023884 Da and a binding energy that is almost 2.23 MeV.

The complete question is,
In terms of binding energy per nucleon, what element divides fission and fusion processes?

A) H

B) He

C) C

D) Fe

E) U

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Which of the following species contain a C4 axis and a σh plane? Choose all that apply.
O [PO4]3-
O [BrCl4]–
O SiCl4
O GeBr4
O XeF4

Answers

[BrCl4]–

of the following species contain a C4 axis and a σh plane.

What kind of organism has a threefold C3 rotation axis?

Ammonia is a member of the symmetry group C3v, which is distinguished by a three-fold axis and three vertical symmetry planes. Figure 11.1 shows the ammonia molecule from two angles. Thus, all six combinations of the three hydrogen atoms have been considered.

The major C6 axis of benzoene encompasses the S6 and S3 axes. Six C2 axes run parallel to the C6 axis. A h, three v, three d, and an inversion center are present. Benzene belongs to the D6h point group as a result.

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Why does the increased level of chemicals in the water affect the survival of aquatic organisms?​

Answers

Answer:

The discharge from factories mixes with various water bodies. The chemical discharges add unwanted and harmful substances into the water. This causes water pollution. Some of the chemicals that are mixed in water are lead, fluorides, carbon monoxide etc. These chemicals are harmful for aquatic plants and animals.Sometimes, the chemicals released also help in algae blooming which takes up a lot of oxygen from water. Lack of oxygen can kill aquatic organisms as well. Therefore, increased levels of chemicals in water is unhealthy for aquatic life.

Answer:

Because algae and many species of plants take on dissolved oxygen, rising nutrient levels in water have an impact on aquatic animal life. Chemicals are carried away from fields and end up in bodies of water including ponds, rivers, and the sea. These provide nutrients for algae to grow.

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Why does the increased level of nutrients in the water affect the survival of aquatic organisms? - Byju's

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Consider the following reaction:
NO+O3?NO2+O2,rate= k[NO][O3]
Part A
What is the overall reaction order?

Answers

The overall reaction order is simply the sum of orders for each reactant. For the example rate law here, the reaction is third order overall (1 + 2 = 3).

What is the overall order of the reaction given the rate law?

The concentrations of reactants frequently influence a reaction's rate, as was discussed in the preceding lesson. The link between the rate of a chemical reaction and the concentration of its reactants is expressed mathematically by rate laws, often known as differential rate laws or rate equations. Take the chemical equation's description of the reaction as an example.

aA+bB⟶products

rate is equal to k[A]m[B]n, where [A] and [B] are the reactant molar concentrations and k is the reaction's rate constant, which varies depending on the reaction's temperature. The reaction orders' exponents, m and n, are normally positive integers, however they can also be fractions.

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What is the name given for the study of how fast reactions take place? O activation energy O chemical kinetics O reaction rate O half-life

Answers

the name given to the The study of how fast reactions take place is called chemical kinetics.

chemical kinetics is the branch of chemistry that deals with the rate of chemical reactions, including how the rate is affected by various factors such as temperature, concentration, and the presence of catalysts. It also includes the study of the mechanisms of reactions, which are the sequence of elementary steps that a chemical reaction goes through to occur.Activation energy is a term used in chemical kinetics to refer to the energy required to initiate a chemical reaction. Reaction rate is the term used to describe how fast a reaction occurs and can be measured in units of concentration per unit of time.

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Q1.This question is about copper.
Please help with a!!!

Answers

As the percentage of impurities increases, the ability of conduction of conductivity decreases.

What is conduction?

Conduction is defined as a process as a means of which heat is transferred from the hotter end of the body to it's cooler end.Heat flows spontaneously from a body which is hot to a body which is cold.

In the process of conduction,heat flow is within the body and through itself.In solids the conduction of heat is due to the vibrations and collisions of molecules while in liquids and gases it is due to the random motion of the molecules .

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Which of the following questions can NOT be addressed using the concept of chemical composition? (The book is Introductory Chemistry 5th edition)
1. What is the market price of iron in ore?
2.How many grams of sodium are consumed by a person in a day?
3. How much hydrogen can be extracted from water for energy?
4. What is the amount of chlorine in the chlorofluorocarbon freon-12 that is found in an air conditioner?

Answers

What is the market price of iron in ore? This question cannot be addressed using the concept of chemical composition.

what is chemical composition ?

Chemical composition refers to the identification of the chemical substances and the proportion of each that make up a specific sample. It can refer to the types and amounts of elements present in a substance, such as the chemical compounds present in a sample of soil or the elements present in a mineral. It can also refer to the specific arrangement of atoms within a molecule, such as the chemical structure of a compound in a pen ink. The chemical composition of a substance can be determined through various analytical techniques such as spectroscopy, chromatography and mass spectrometry. Understanding the chemical composition of a substance is important in many fields, such as chemistry, geology, medicine, and materials science, as it can provide information about the properties, reactivity, and potential uses of the substance.

What is the price of iron in the market? This question cannot be addressed using the concept of chemical composition as it deals with economic aspect of iron ore and not its chemical composition.

How many grams of sodium are consumed by a person in a day? This question deals with the amount of a specific element, sodium, consumed by a person in a day, which can be addressed using the concept of chemical composition as it deals with the amount of a specific element in a sample.

How much hydrogen can be extracted from water for energy? This question deals with the amount of a specific element, hydrogen, that can be extracted from a compound, water, which can be addressed using the concept of chemical composition as it deals with the amount of a specific element in a sample.

What is the amount of chlorine in the chlorofluorocarbon freon-12 that is found in an air conditioner? This question deals with the amount of a specific element, chlorine, in a compound, chlorofluorocarbon freon-12, which can be addressed using the concept of chemical composition as it deals with the amount of a specific element in a sample.

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Lysine is a compound composed of carbon, hydrogen, nitrogen and oxygen. when 1.50 g of lysine is burned, 2.72 g of carbon dioxide, 1.29 g of water and 0.287 g of nitrogen gas are produced. what is the empirical formula?

Answers

The empirical formula of a compound can be determined by analyzing the mass percentages of its various elements and expressing them as the smallest whole number ratio. To find the empirical formula of lysine, we first need to determine the number of moles of each element present in 1.50 g of lysine. We can then use these values to calculate the mole ratios of the elements, which will be the same as the ratio of the subscripts in the empirical formula.

By knowing the mass of produced CO2 and H2O we can calculate how many moles of C and H are present in 1.50 g of lysine

mass of C = 2.72 g CO2 x (1 mol CO2 / 44.01 g CO2) = 0.062 moles

moles of H = 1.29 g H2O x (2 moles H / 18.02 g H2O) = 0.072 moles

Then, by knowing that lysine also produced 0.287 g of N. We can calculate the number of moles of N

moles of N = 0.287 g N x (1 mole N / 28.02 g N) = 0.0102 moles

We can now find the ratio of the elements by dividing each by the smallest number of moles which is 0.0102 moles.

C:H:N = 0.062 moles / 0.0102 moles = 6:1:1

So the empirical formula of lysine is C6H14N2

Which is not true of a resistor?
A. It hinders the flow of current.
B. It makes some energy turn into heat.
C. Its unit of measurement is the ampere.
D. More than one can be used in a circuit.

Answers

The following which is not true of a resistor is that its unit of measurement is the ampere and is therefore denoted as option C.

What is a Resistor?

This is referred to as a passive two-terminal electrical component that implements electrical resistance as a circuit element by resisting or hindering the flow of current.

More than one can be used in a circuit and it is dependent on the aim and materials involved and some energy is usually turned into heat during its use. The unit of the electrical resistance, measured with direct current, is the ohm (Ω) and was named after the German physicist and mathematician Georg Simon Ohm.

This is therefore the reason why its unit of measurement being ampere isn't true hence why option  was chosen as the correct choice.

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Identify the principal type of energy (kinetic or potential) exhibited by each of the following.
O A car parked on a hill. O A car traveling at 60 miles per hour. O Chemical energy O A falling rock O Compressed air in a tank netic

Answers

The energy that an object has stored due to its position is known as potential energy. Kinetic energy is the energy that a moving thing has as a result of its motion.

The energy that a body has as a result of its position or state is known as potential energy. Potential energy is fully independent of its environment, as contrast to kinetic energy, which is relative to the state of other things in its environment. So a car parked on a hill merely demonstrates potential energy, whereas a car moving at 60 mph demonstrates kinetic energy. As it descends from a certain height at a specific speed, a rock exhibits both potential energy and kinetic energy. A tank of compressed air demonstrates potential energy. Chemical energy is therefore seen as a type of potential energy because it is stored in chemical bonds.

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If your front lawn is 19.0
feet wide and 20.0
feet long, and each square foot of lawn accumulates 1050
new snowflakes every minute, how much snow, in kilograms, accumulates on your lawn per hour? Assume an average snowflake has a mass of 1.50 mg.

Answers

The mass of snow in kilograms that accumulates on your lawn per hour is 35.91 kg.

What is the area or the lawn?

The area of the lawn is determined as follows:

Area of the lawn = length * breadth

Area of the lawn = l20 * 19 square feet

Area of the lawn = 380 square feet

Mass of an average snowflake = 1.50 mg

Total number of snowflakes that the lawn accumulates per hour = 1050 * 380 * 60

Total number of snowflakes that the lawn accumulates = 23940000 snowflakes

Total mass in kilograms of that the lawn accumulates per hour = 23940000 * 1.50 mg * 1 mg / 1000000 kg

Total mass in kilograms of that the lawn accumulates = 35.91 kg

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at which temperature does sf6 (boiling point 16°c at 1 atm) behave most ideally?

Answers

The optimal behavior of SF6 is achieved at a higher boiling point of 150C.

What factors determine the temperature?

Temperature is a unit used to represent how hot or cold something is. It can be stated using the Celsius or Fahrenheit scales, among others. Temperature shows which way heat energy will naturally flow, i.e., from a hotter (body with a higher temperature) to a colder (body with a lower temperature) (one at a lower temperature).

What is the chemistry equivalent of writing temperature?

Instead of using the written word to indicate temperature measurements, the ° symbol is typically used instead, with a space coming after the number but not before the temperature scale: To achieve 80 °C, the sample was heated.

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what product is formed when the following compound is treated with na2cr2o7, h2so4, h2o?

Answers

In the last we can say that when phenol is oxidised to sodium dichromate in acidified solution, it will form benzoquinone.

What does Na2Cr2O7 do to an h2o?

Primary alcohols can be oxidised into either aldehydes or carboxylic acids depending on the reagent. While PCC with CH2Cl2 stops at the aldehyde, Jones reagent (CrO3 with H3O+) and Na2Cr2O7 with H2SO4 oxidise primary alcohols all the way to carboxylic acids.

Alcohols in the tertiary stage won't oxidise. In addition to CrO3, sodium dichromate and potassium permanganate (KMnO4) are other frequently utilised oxidising agents (Na2Cr2O7). Any of these chemicals can be used to oxidise primary alcohols to produce carboxylic acids and secondary alcohols to produce ketones.

Every time an oxidation or reduction reaction takes place, a corresponding reduction reaction must also occur. In a reaction, a molecule must also be being reduced in order for an alcohol to be oxidised.

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Label each of the atomic and molecular orbitals shown below where there is 2s-2p mixing. O 2s O 2p O sigma_2s O sigma_2s^* O sigma_ 2p O sigma_2p^* O pi_2p O pi_2p^*

Answers

Atomic orbitals and molecular orbitals are mathematical functions that describe the behavior of electrons in atoms and molecules, respectively. the attachment 1 below describes the labelling of  the atomic and molecular orbitals shown below where there is 2s-2p mixing.

Atomic orbitals are the solutions of the Schrödinger equation for the electron in an isolated atom. They are characterized by the principal quantum number (n), the angular momentum quantum number (l) and the magnetic quantum number (m). Each orbital can hold a maximum of two electrons, one with a spin of +1/2 and the other with a spin of -1/2.Molecular orbitals, on the other hand, are the solutions of the Schrödinger equation for the electrons in a molecule

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the complete question is :

Label each of the atomic and molecular orbitals shown below where there is 2s-2p mixing. O 2s O 2p O sigma_2s O sigma_2s^* O sigma_ 2p O sigma_2p^* O pi_2p O pi_2p^*

a large doublet and a small septet pattern in 1h nmr is usually indicative of a(n)

Answers

Isopropyl group is  a large doublet and a small septet pattern in 1h nmr is usually indicative of a(n)

In organic chemistry, an isopropyl group is a functional group composed of a propane molecule with the middle carbon atom replaced by a hydroxy group (-OH). The chemical formula "-C(CH3)3" or "-(CH3)2CH-" is commonly used to represent it. Isopropyl groups can be found in a wide range of compounds, such as alcohols, esters, and ethers. Isopropyl alcohol, also known as isopropanol, rubbing alcohol, or IPA, is a type of organic compound classified as a secondary alcohol. Secondary alcohols are compounds that contain a secondary alcohol functional group and have the general formula HOC(R)(R') (R, R'=alkyl, aryl).

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Which of the following aqueous solutions has the highest molar concentration of Na+ (aq)? (Assume each compound is fully dissolved in water:) Ier All of these solutions have the same concentration of Na+ (aq) A. 6.0M NaCl (sodium chloride) B. 6.OM NaC2H302 (sodium acetate) C. 2.OM Na3PO4 (sodium phosphate) D. ed 3.OM Na2SO4 (sodium sulfate)

Answers

The amount of sodium+ in each of these solutions is the same (aq), with the maximum molar concentration of Na+ occurring in the aqueous solutions.

supposing that every substance in the water has completely dissolved The quantity of a solute present in a solution expressed as a molar concentration. These are the units: mol/L, mol/dm 3, or mol/m 3. The unit M, or molar, can be used to denote molar concentration, also referred to as molarity. The Latin name for sodium is natrium, and it has the chemical elemental number 11 and the symbol Na. It is an extremely reactive, delicate, silvery-white metal. The periodic table's group 1 designates sodium as an alkali metal. Na is its sole stable isotope. Natural occurrences of the free metal don't exist.

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Give the formula and charge of the oxoanion in each of the following compounds: potassium sulfite sodium perchlorate lithium phosphite magnesium hypochlorite

Answers

a) KSO4 charge on SO4-2 - Potassium sulfite

b) NaClO4 charge on ClO4 - Sodium perchlorate

c) LiPO3 charge on PO4-3 - Lithium phosphate

d) MgClO charge on ClO- - Magnesium hypochlorite

What is chemical formula?Using chemical element symbols, numbers, and occasionally other symbols like parentheses, dashes, brackets, commas, and plus and minus signs, a chemical formula in chemistry is a way of expressing information about the chemical proportions of atoms that make up a specific chemical compound or molecule. An element's number of atoms in the compound's smallest unit, whether it be a molecule or a formula unit, are listed in a chemical formula, along with the compound's constituent elements. Given a chemical formula, we can name simple compounds by using knowledge of the names of the elements and a few fundamental principles. A compound's constituent elements and their relative quantities are listed in a chemical formula.

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Which of these changes is an example of a chemical change?

A.) evaporation of water from a pan.
B.) water droplets forming outside a glass on a hot day.
C.) cooking an egg.
D.) dry ice turning into a gas. ​

Answers

Answer:

d

Explanation:

d is the answer because the chemicals have changed forms from a solid to gaseous state of matter.

An experimental plot of ln(Pvap) vs. 1/T is obtained in lab for an unknown liquid. The slope of the best-fit line for the graph is -3840 K. What is the enthalpy of vaporization for the liquid in kJ/mol?

Answers

The enthalpy of vaporization of the unknown liquid is -31.9 kJ/mol.

What is the enthalpy of vaporization?

We know that vaporization is the process that occur when there is a change from liquid to gas of a material at the boiling point of the substance . We must also note that the boiling point of the substance is the atmospheric temperature which is 1 atm.

Thus;

lnP  = -ΔHvap/R  * 1/T

We know that;

P = atmospheric pressure

R = gas constant

T = temperature

Hence;

ln(1) = -ΔHvap/8.314 * 1/ -3840

 -3840  * 8.314 = -ΔHvap

= -31.9 kJ/mol

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A 0.10 M HF solution is 8.4% ionized. Calculate the H+ ion concentration.

Answers

The H+ ions concentration in a 0.10 M HF solution that is 8.4% ionized is 0.0084 M.

Describe ionization of hydrofluoric acid (HF).

The ionization of a weak acid, such as hydrofluoric acid (HF), can be described by the following equilibrium:

HF(aq) <=> H+(aq) + F-(aq)

The equilibrium constant for this reaction is known as the acid dissociation constant (KA) and can be used to calculate the H+ ion concentration in a solution of a weak acid.

The percent ionization of a weak acid is defined as the ratio of the concentration of H+ ions at equilibrium to the initial concentration of the acid, multiplied by 100.

In this case, the percent ionization of the 0.10 M HF solution is 8.4%. Therefore:

(H+ ion concentration at equilibrium/initial concentration of HF) * 100 = 8.4%

Hence, the H+ ion concentration at equilibrium is (8.4/100) * 0.10 M = 0.0084 M

So, the H+ ion concentration in a 0.10 M HF solution that is 8.4% ionized is 0.0084 M.

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mole practice chemistry
show your work​

Answers

The number of moles in 44 g of CO₂ is one mole. Number of moles of 98 g of O₂ is 3 moles. Similarly the number of moles in 12 g of MgCl₂ is 0.12.

What is one mole ?

Any substance that contains 6.02 × 10²³ atoms or molecules is called one mole of that substance. This number is called Avogadro number. One mole of every element contains Avogadro number of atoms.

The mass of one mole of a compound is called its molar mass. We can determine the number of moles in a given mass of the compound by dividing the mass by molar mass.

no.of moles = given mass/molar mass.

Molar mass of CO₂ = 44 g

hence 44 g of is one mole.

Molecular mass of O₂ = 32 g

moles in 98 g = 98/32 = 3 moles.

Molar mass of   MgCl₂ = 95 g/mol

moles in 12 g = 12 /95 = 0.12 moles.

In the similar way, the number of moles of all compounds for the given mass can be calculates.

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The volume of 1 drop of medicine is 1.77 mL.what is the volume in deciliters of 100 drops of medicine? Write your answer as a decimal

Answers

The volume in deciliters of 100 drops of medicine is calculated as 1.77 deciliter.

What do you understand by the term deciliter?

Deciliter is a metric unit of capacity which is equal to ¹/₁₀ liter.

Some medical tests report result in grams (g) per deciliter (dL). Gram is equal to the weight of one milliliter or 16 drops of water which is around 1/30 of an ounce. Deciliter measures fluid volume equal to 1/10 of liter. A liter is a little bigger than quart of a fluid.

Given 1drop of medicine =1.77 ml

So, 100drops=177 ml

As, 1ml=0.01 dl

Hence, 177 ml=1.77 deciliter.

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