in a laboratory experiment, a student found that a 195-ml aqueous solution containing 2.494 g of a compound had an osmotic pressure of 12.2 mmhg at 298 k. the compound was also found to be nonvolatile and a nonelectrolyte. what is the molar mass of this compound?

Answers

Answer 1

The compound's mole ratio in a laboratory setup is 3125.12 g/mol, according to the statement.

Water: an electrolyte or not?

Water that is completely free of ions is said to be pure. This could conduct electricity as a result. The inclusion of ions in the mixture allows the solution to carry an electric current when other substances, such as ionic compounds, are dissolved in water.

Briefing:

Osmotic pressure is given by;

π = C * R * T

∵ 760 mmHg = 1 atm

10.3 mmHg = 1 * 12.2/760 atm

= 0.016 atm

π = no. of moles * R * T/volume (L)

π = Weight (g) * R * T / Molar mass * V (L)

0.016 atm = 2.494 * 0.082 L atm K⁻¹ mol⁻¹ * 298 K/ M.W * 195 * 10⁻³

M.W = 3125.12 g/mol

Consequently, the compound's molar mass is 3125.12 g/mol.

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Related Questions

Which type of bond will most likely be found in HBr given that the electronegativity of hydrogen is 2.20 and the electronegativity of bromine is 2.96?an ionic bonda metallic bonda polar covalent bonda nonpolar covalent bond

Answers

A polar covalent bond.

Polar covalent bond:

A covalent bond in which the electron density is unevenly shared between the two bonded atoms, due to a difference in electronegativity or due to inductive effects.

There is a bond between the atoms, and electrons are shared, but they are pulled more closely towards one of the atoms in the bond. The atom that pulls the electrons more closely has a slight negative charge, and the other atom has a slight positive charge in the opposite direction.

In HBr, both H and Br are nonmetals so the bond must be covalent. The difference in their electronegativities is:

ΔE = |EN(H)-EN(Br)| = |2.20-2.96| = 0.76

Hence this bond recognized as Polar covalent bond.

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what mass of hi should be present in 0.300 l of solution to obtain a solution with each ph value?

Answers

0.054 gm of of HI should be present in 0.300 l of solution to obtain a solution with each pH value.

A solution's pH is a measure of its hydrogen ion concentration, which is a measure of its acidity. Pure water dissociates slightly into hydrogen and hydroxyl (OH) ions in equal proportions.

In chemistry, pH is a scale used to quantify the acidity or basicity of an aqueous solution. It was traditionally denoted as "potential of hydrogen". The pH of acidic solutions is lower than that of basic or alkaline solutions.

Indicators may be used to monitor pH since their colour varies as the pH changes. A visual comparison of the colour of a test solution with a standard colour chart allows for precise pH measurement to the closest whole integer. Color may be quantified more precisely if it is measured spectrophotometrically with a colorimeter or spectrophotometer.

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A student makes the following statement:
“Ozone depletion is causing global warming. When the ozone layer is destroyed, more UV light reaches Earth’s surface. An increase in UV light causes Earth to be warmer.”

Evaluate the student’s statement to decide whether you agree/disagree and support your answer

Answers

I agree with the student's statement that states that ozone depletion is causing global warming.

What is ozone layer depletion?

Ozone layer depletion is the gradual thinning of the earth’s ozone layer in the upper atmosphere caused due to the release of chemical compounds containing gaseous bromine or chlorine from industries or other human activities.

The ozone layer is a region in the earth’s stratosphere that contains high concentrations of ozone and protects the earth from the harmful ultraviolet radiations of the sun.

Global warming is a sustained increase in the average temperature of the Earth, sufficient to cause climate change.

Greenhouse gases emitted into the atmosphere are the causes depletion of ozone layer, which in turn leads to global warming.

Chlorofluorocarbons or CFCs are the main cause of ozone layer depletion. These are released by solvents, spray aerosols, refrigerators, air-conditioners, etc.

Therefore, the statement made by the student is correct and I agree with it.

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Anything that takes up space is called _____

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Matter is everything that occupies physical space. Everything on earth, including the atmosphere, that occupies space and has a certain mass is considered matter.

Anything that occupies space and has mass is considered to be matter. The world around you is composed of matter. A general phrase for the "stuff" all around you is matter. An item has a quantifiable size or volume when it occupies space. A measurement of matter's resistance to acceleration is its mass. Everything around us takes up space. Now, we are aware that matter refers to everything that takes up space. Atoms are the minuscule constituents of matter. Typically, we focus our studies solely on the three states of matter: solid, liquid, and gas.

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Consider the reaction of a generic metal ion (Mn+) with a generic porphine molecule (por): M(H2O)mn+(aq)+por(aq)⇌M(por)n+(aq)+mH2O(l) Based on the values of standard enthalpy, ΔH∘, and entropy, ΔS∘, shown here, ΔH∘ ΔS∘ -21.5 kJ 7.82 J/KJ/K what is the value of the formation constant, Kf , for the reaction at 25 ∘C?

Answers

Kf, at 25 °C, is 713 for the reaction  M(H2O)mn+(aq)+por(aq)⇌M(por)n+(aq)+mH2O(l)

The chemical compound porphine, sometimes known as porphin, has the formula C20H14N4. It is the simplest of the tetrapyrroles since it is composed of four pyrrole-like rings connected by four methine (= C H ) groups to form a bigger macrocycle ring. The molecule is flat. It is categorized as a heterocyclic and aromatic chemical. The measure of a system's chaos is called entropy. It is an extensive characteristic of a thermodynamic system, which indicates that the amount of matter in the system affects how much it is worth. Entropy is frequently represented in equations by the symbol S and is measured in joules per kelvin (JK1) or kg/m2/s2K1. The entropy of a well organized system is low.

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i’m marking brainiest

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Atoms will combine with each in order to become more chemically stable. Compounds are formed between two atoms that have incomplete outer energy levels. The two types of compounds that can be formed between atoms are ionic and covalent. Ionic compounds are formed between two oppositely charged atoms. ionic compounds contain a metal ion and a non - metal ion:

Metals will lose electrons to form positive ions and nonmetals will gain elections to form negative ions. These oppositely charge ions are very attracted to each other and forms very strong bonds as a result.

Ionic compounds are characterized by crystalline structure.

High melting and boiling points, and are solids at room temperature.

Two non-metals will combine to form covalent compounds. Covalent compounds are formed when two atoms share one or more pairs of electrons The force of attraction between the main relatively weak. Covalent compounds are characterized by low melting and boiling points, and can be gases, liquids and soft solids at room temperature.

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Identify the reagents needed to carry out each reaction. H20 Br NaH OH TsCI pyridine OTs TsOH Br HBr NBS KOC(CH3)3 CI H.O 2 Br 011 Cl

Answers

To solve this, we need to have a clear concept behind reactions of chemical reagent. Therefore, the reagents can be filled in below given ways.

What is chemical reagent?

The word "reagent" refers to a chemical component (a compound or combination, often of inorganic or tiny organic molecules) injected into organic chemistry to produce the desired conversion of an organic material. Collins, Fenton, and Grignard reagents are among examples.

The reagent  needed to carry out each reaction are:

For first reaction, reagent needed are HBr and KOC(CH[tex]_3[/tex])[tex]_3[/tex].

For second reaction, reagent needed are TsCl, pyridine and KOC(CH[tex]_3[/tex])[tex]_3[/tex].

For third reaction, reagent needed are TsOH, NBS and KOC(CH[tex]_3[/tex])[tex]_3[/tex].

For first reaction, reagent needed are Cl[tex]_2[/tex],H[tex]_2[/tex]O, NaH and HBr.

Therefore, the reagents can be filled in above given ways.

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Can energy be destroyed?

Answers

Answer: No

Explanation:

Why does C have 4 valence electrons?

Answers

Carbon has four valence electrons, so it can achieve a full outer energy level by forming four covalent bonds.

What type of bond form by carbon ?

Because of its small size and ability to tightly hang on to the shared pairs of electrons, carbon forms strong bonds with the majority of other elements.

Carbon is 2,4 in its electrical form. As a result, it typically creates covalent compounds because it is unable to add or subtract four electrons to complete an octet. Methane is a prime example of such a substance (CH4).

The electrons closest to the nucleus experience the least attraction from it, making them the most reactive. Valence electrons are these electrons. The most significant part of chemical bonding is played by them.

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How many bonds can chlorine make?

Answers

Answer:

7 covalent bonds

Explanation:

Answer:

In these compounds carbon, nitrogen, oxygen, and chlorine atoms have four, three, two, and one bonds, respectively.

Explanation:

Which phrase describes the movement of air in general?

A. from high pressure to low pressure
B. from north to south
C. from south to north
D. from low pressure to high pressure

Answers

The statement above which identifies the best phrase which describes the movement of air in general is: from high pressure to low pressure.

The correct answer choice is option a.

What is meant by air?

Air is regarded as a mixture due to the fact that it contains different substances such as carbon dioxide, oxygen, rare gases, dust, water , moisture and so on and so forth. However, air usually moves from high pressure to low pressure simply because as air particles warm, it usually ascends, leading to low pressure at the surface.

In conclusion, we can now confirm and deduce from the explanation given above that air too moves from one point to another.

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Give the Lewis dot structure for CH3O

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CH3O Lewis dot structure has two lone pairs, one single electron, and a negative charge. The central atom, carbon does not hold any lone pars as after binding the compounds get filled valence shells with the help of electrons shared by Hydrogen and Oxygen atoms.

In his idea of cubic atoms, Lewis developed the "octet rule." The preference of atoms to have eight electrons in the valence shell is referred to as the "octet rule." Atoms with fewer than eight electrons have a propensity to interact, resulting in the formation of more stable compounds. The most stable state that atoms can achieve through their reactions. Two dots or a line (Kekulé structures lines) between the connected atoms serve as representations of bonds, which are made up of two shared electrons. Using two and three lines/(pairs of electrons), respectively, double bonds and triple bonds are shown. A Lewis dot structure is based on the octet rule, which states that atoms share electrons so that each has eight electrons in its outer shell

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What is meant by exposure route?

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Exposure route can be defined as a way by means of which a person can come in contact with the hazardous chemicals, this can be prevented by wearing personal protective equipments.

What are personal protective equipments?

Personal protective equipment is a protective clothing which is worn to protect the wearer's body from hazard or injury.The hazards which can be addressed by the use of personal protective equipment are physical,chemical and bio hazards.

It imposes a barrier between the user and the working environment.The main purpose of personal protective equipment is to reduce exposure of employees to the hazards.

It has a limitation that it does not eliminate the hazard and may lead to harm to the employee if the equipment is damaged.

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. Activity effects may be expected to be most important in a. extremely dilute solutions. b. solutions of low pH. c. very concentrated solutions.

Answers

The correct Answer is C. concentrated solutions.

The activities of all species tend to be smaller than the formal concentration solutions become more concentrated. The decrease in activity with increasing concentration is much more pronounced for ions than for neutral solutes. Chemists can use activities to explain various differences between ideal and real solutions. To describe a real solution, the mathematical description of an ideal solution must be modified, just as the law for ideal gases (PV = nRT) must be modified to describe real gases.

Activity measures how many particles "appear" to be present in the solution, as opposed to how many are actually present. As a result, activity acts as a "fudge factor" in ideal solutions, correcting the true concentration. agas is a unitless ratio. The ratio asolute has no units.

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A gas mixture containing oxygen, nitrogen, and carbon dioxide has a total pressure of 42.9 kpa. what is the partial pressure of carbon dioxide if the partial pressure of oxygen is 6.6 kpa and the partial pressure of nitrogen is 23.0 kpa?
a. 29.6 kpa
b. 19.9 kpa
c. 13.3 kpa
d. 36.3 kpa
e. 14.3 kpa

Answers

Answer:

c

Explanation:

Whatever is left :

42.9 - 6.6 - 23 = 13.3 kpa

Answer:

13.3 kpa

Explanation:

What Is The Product Of The Following Reaction Sequence:

Answers

Answer:

H +O2 gives H20 means water

C + O2 gives Co means carbon monoxide

Al+ O2 gives Al2O3 means Aluminium oxide

Mg +O2 give MgO2 means magnesium hydroxide

.The equation shows the complete combustion of propane.
C3H8(g) + 502(g) → 3CO2(g) + 4H₂O(l)
Which statement is correct?
A 10 cm³ of propane cannot burn if less than 50 cm³ of oxygen is present.
B 10 cm³ of propane would produce 40 cm³ of liquid water.
C 100 cm³ of oxygen would be sufficient to react completely with 20 cm³ of propane.
D This reaction would result in an increase in the volume of gas.​

Answers

Answer:

A.

Explanation:

Ten cc propane would require 50 cc oxygen TO BURN ALL OF THE PROPANE; HOWEVER, some propane will burn if some oxygen is present. If less than 50 cc not all of the propane will burn.

to start, watch as we mix various metal nitrates and alkali metal salts. make observations of the salts in water. which rule matches the videos the best?

Answers

The correct statement about alkali metals and nitrate salts is c) Alkali metal salts and nitrate salts  are always soluble.So,correct option is c.

Salts of the alkali metal salt and the ammonium ion, Li+, Na+, K+, and NH₄+ are used to  soluble. Most importantly all metal nitrates and metal acetates are soluble.

The solvency of the metal nitrate in water containing carbon dioxide causes the arrangement of caverns with stalagtites and stalagmites and is liable for hardness in water. Other significant mixtures are the carbide, chloride, cyanamide, hypochlorite, nitrate, and sulfide. The dissolvability of silver nitrate is low to such an extent that everything except an irrelevant measure of it is hastened when overabundance sodium chloride arrangement is added to silver nitrate arrangement. What might be the heaviness of the hasten shaped when 100 ml of 0.5 M NaCl is added to 50.0 ml of 0.100 M AgNO₃.

Hence,correct option is c.

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(Complete question) is:

To start, watch as we mix various metal nitrates and Alkali metal salts. Which statement is true?

a) Alkali metal salts are soluble and nitrate salts are not.

b) Alkali metal and nitrate salts are never soluble.

c) Alkali Metal and Nitrate salts are always soluble

d)Alkali metal salts are not soluble while nitrate salts are soluble

Given the volumes of a solvent and solute and their density, what temperature do they freeze at? It would really help if someone helped explain how to do this, I’m kind of stuck thanks

Answers

Yes, it will freeze at 0 degree Celsius. The correct option is A.

What is freezing point?

The temperature at which a liquid solidifies is known as the freezing point. Similar to the melting point, the freezing point typically rises with increasing pressure.

The freezing point depression equation must be used to calculate the freezing temperature of a solvent and solute mixture. You can use this equation to determine how adding a solute alters a solvent's freezing point.

ΔTf = Kf x molality

Here,

Mass of the solvent = 100 mL x 1 g/mL = 100 g

Molality of the solute = 10 g / 58.44 g/mol = 0.171 mol

Molality of the solvent = 0.171 mol / 100 g = 0.00171 mol/g

So,

ΔTf = 1.86 °C/m x 0.00171 m = 0.00316 °C

Thus, the correct option is A.

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order the following ion pairs by decreasing bond strength. (strongest to weakest: left to right.)

Answers

From strongest to weakest bond strength: left to right:- Mg^2+ O^2 > Ca^2+ O^2- > Ca^2+ Se^2- >Li F^- > Na^+ F^- > Na^+ Br^- due to short Ionic Bond strength.

Bond energy, also known as mean bond enthalpy as well as average bond enthalpy, is a measure of the strength of a chemical bond. In chemistry, bond strength has been defined as the strength that a chemical bond contains two atoms together. This one is usually expressed in kilocalories per mole as the amount of energy needed to break the bond.

Due to the electrostatic attraction among its negative and positive ions, an ionic compound is stable. The lattice energy of an ionic bond is the amount of energy required to separate one mole of the a compound into its gas phase ions. Ions to higher charges as well as shorter distances between them have higher lattice energy.

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What is 1 moles in grams?

Answers

Carbon-12 has a theoretical atomic mass of 12 grams (6 protons and 6 neutrons). This means that the atomic mass or atomic weight of carbon (12 grams) equals exactly 1 mole of carbon.

In the International System of Units, the mole (symbol mol) is the unit of substance amount (SI). The amount of substance is a measurement of how many elementary entities of a given substance are present in an object or sample.

An elementary entity can be an atom, a molecule, an ion, an ion pair, or a subatomic particle such as an electron, depending on the substance. For example, despite having different volumes and masses, 10 moles of water (a chemical compound) and 10 moles of mercury (a chemical element) contain equal amounts of substance, and the mercury contains exactly one atom for each molecule of water.

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What is the molarity of C2H5OH water solution which will freeze at 10 degree Celsius?

Answers

The molarity of C2H5OH water solution which will freeze at -10 degree Celsius is 5.3 molar.

What is molarity?

A solution's molar concentration, also known as molarity, is the number of moles of solute present in a specific number of liter of the solution, or moles per liter.

Two indicators are used to measure it: the volume of the solution and the quantity of solute molecules. In essence, liter are used to measure the volume of the solution. "M" stands for "molarity."

According to the given question:

The depression if the freezing point

ΔTf = i ⋅ Kf ⋅m

ΔTf = -10 °C= 10 K = the depression if the freezing point

i = 1= van't Hoff's factor (ethanol is non electrolyte and does not dissociate in aqueous solution).

Kf =1.86 Kkg/mol= molal depression in freezing point constant

m= molality

ΔTf =i⋅ Kf ⋅m

10 K=1×1.86 K kg/mol × m

m=5.3 mol/kg=5.3 m

Hence, the molality of solution is 5.3 m.

Complete question:

What is the molality of C2H5OH in water solution which will freeze at -10 degree Celsius?

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How do water and land surfaces differ in their abilities to absorb and radiate heat energy?

Answers

Land absorb more radiation from the solar energy than water and retains the absorbed heat.

As the earth surface is darker compared to the water surface, more radiations gets absorbed, so it heats up quickly. Water surface reflects most of the incoming radiations, so it takes longer for water to get heated. Also, it takes less energy to rise the temperature on land than water, because water has higher specific heat capacity. Also water cools downs slowly because of this.

Due to this difference in heating and cooling properties of land and water, the differences in temperature and air mass movement occurs across land and water. During day time, as it absorbs more radiations, the land gets heated up quickly and temperature of water changes only slightly. During night, the temperature of lands drops quickly, but water will retain the temperature for long period.

Thus land gains and lose heat quickly compared to water and this result in climatic changes across different areas.

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Why do thunderclouds grow very tall?

Answers

Answer:

This lift usually comes from differences in air density. Warmer, less dense air rises upward, creating lift. As the air lifts higher and higher, it causes a storm cloud to grow taller and taller. Thunderstorm clouds can rise up to 10 miles into the air!

the percent copper in an unknown copper compound is 26.30 %. what is the formula weight of the unknown compound? you may assume that one mole of the compound contains one mole of copper. enter your answer in units of amu.

Answers

The unidentified compound's weight in the recipe is To find the fraction, divide the percentage by 100. 63.55 divided by the fraction equals the molecular weight. 225.4 atomic units.

What is the purpose of copper compound?

It is utilized in pyrotechnics, pyrolysis, anti-fouling coatings, flame proofing, printing, photocopying, and electrolysis operations. The atomic number 29 and chemical symbol Cu are assigned to the element copper.

What is the most typical compound made of copper?

Cu2O, Cu2Cl2, and cuprous sulfide are a few of the significant commercial compounds of copper(I) (Cu2S). The mineral cuprite, which contains cuprous oxide as a reddish brown or red crystal or powder, naturally occurs.

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What temperature is hot sink water?

Answers

The safest temperature to avoid scalding is 120 degrees Fahrenheit, but 140° seems to be the common default option. Most experts believe that any under 120 degrees Fahrenheit increases the risk of bacteria, such as legionella, which causes Legionnaire's disease, developing inside the hot water system from stagnant water.

What do Fahrenheit means?

The Fahrenheit scale is a thermal scale that was proposed by physicist Daniel Gabriel Fahrenheit in 1724. The degree Fahrenheit is the unit of measurement. Fahrenheit is a temperature scale in which ice forms at 32 degrees & boils at 212 degrees. The symbol ° F represents it.

What is temperature?

Temperature is a physical measure that quantifies our feelings of hotness and coldness. A thermometer is used to measure temperature.

Thermometers are scaled in a variety of temperature scales that have historically been defined by various points of reference and thermometric substances.

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question another sample of eggshell reacts completely with 4.0ml of an hcl(aq) solution of unknown concentration. if the reaction produced 0.095atm of gas, the concentration of the hcl(aq) solution was at least

Answers

The concentration of the HCl (aq) solution was at least 1.0 M.

What is concentration?

The abundance of a constituent divided by the sum of the mixture's volumes is the definition of concentration in chemistry. There are several different categories of mathematical description: mass concentration, molar concentration, number concentration, and volume concentration

P = 0.095atm(corresponds to 0.20g of CaCO3

so,moles of CaCO3 =0.20g/100gmol⁻¹=0.002moles

moles of HCl =(molesₓCaCO3ₓ2)=0.002ₓ2

M=0.004/4ₓ100

Concentration of HCl=1M

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I got stuck on this question

Answers

Answer:

The best conductor is Copper

Explanation:

because it's able to generate more heat than the other 2

Q.) Oxidation number of P in PO4³, of S in SO4² and that of Cr in Cr₂O7² are respectively:
(a) +3, +6 and +5
(b) +5, +3 and +6
(c) +3, +6 and +6
(d) +5, +6 and +6










Answers

The correct option is (c), +3, +6 and +6.

In a compound, the sum of the oxidation numbers of all the atoms must be equal to the overall charge on the compound. In the case of PO4³-, the overall charge is -3, so the sum of the oxidation numbers of P and O must be -3. We know that the oxidation number of O is -2, so the oxidation number of P must be +3, which is option (c).

Similarly, in the case of SO4²-, the overall charge is -2, so the sum of the oxidation numbers of S and O must be -2. We know that the oxidation number of O is -2, so the oxidation number of S must be +6, which is option (c).

Finally, in the case of Cr₂O7²-, the overall charge is -2, so the sum of the oxidation numbers of Cr and O must be -2. We know that the sum of the oxidation numbers of the O atoms is -14, so the sum of the oxidation numbers of the Cr atoms must be +12. Since there are two Cr atoms, each must have an oxidation number of +6, which is option (c).

What happens to the molar volume when the pressure decreases?
-Molar volume increases
-Molar volume decreases
-Molar volume stays the same

Answers

Ideal gas law is valid only for ideal gas not for vanderwaal gas. Therefore, when the pressure decreases, molar volume increases. Ideal gas is a hypothetical gas.

What is ideal gas equation?

Ideal gas equation is the mathematical expression that relates pressure volume and temperature. There is no force of attraction between the particles.

Mathematically the relation between Pressure, volume and temperature can be given as

PV=nRT

where,

P = pressure of gas

V= volume of gas

n =number of moles of gas

T =temperature of gas

R = Gas constant = 0.0821 Latm/Kmol

According to above equation we can see that pressure is inversely proportional to volume. On decreasing the pressure, volume will increase.

Therefore, when the pressure decreases, molar volume increases.

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Answer:

A. molar volume increases

Explanation:

Checked on edge.

Other Questions
Archaebacteria and eubacteria are classified into different kingdoms, but at one time they were both classified in the Kingdom Monera. Which statement best describes why the classification of these organisms was changed? A. The kingdom became too large and had to be made into two smaller kingdoms.B. New biochemical data showed different evolutionary relationships within the kingdomC. The archeabacteria and eubacteria habitats were too different to be classified in the same kingdom.D. Chromosomal analyses indicated a new genetic combination had arisen within a certain organisms in the kingdom. Select all that apply.According to the text, which of the following were characteristic of Restoration drama?sentimentalpsychologically complex charactersmore violentheavily moralisticvirtuous heroines True/False: People used a hot air balloon to escape East Berlin. In a eukaryotic cell, which of the following processes directly involves DNA? One day last summer, Tommy decided to take a drive into the countryside. After a few hours' drive he arrived at a farm stand. Tommy was so excited by the sight of all those fresh fruits and veggies, that he tripped getting out of his MG and knocked over a huge basket of eggs. And of course they all broke!He asked the farmer how many eggs were in the basket because he obviously wanted to compensate her for them. She said she didn't know exactly."But I do know,' she said, "that this morning I decided the eggs would be easier to sell if they weren't in a big basket but if they were in little paper bags."So when I took all my eggs and placed two in each bag I had one left over. I didn't like that so I took the eggs and I put three in each bag. And when I did that, I also had one left over."When I put four in each bag, I had one left over. When I put five in a bag or six in a bag, I had one left over. And when I put seven in a bag, I had none left over."So here's the question: what's the smallest number of eggs that Tommy should have to pay for? Light yogurt sales in the United States have been declining eight percent per year since 2016 due to younger consumers choosing to switch to Greek yogurt. In 2016, distributors had $1.2 billion in light yogurt sales. Which equation could be used to represent light yogurt sales (in billions of dollars) in the U.S. 't' years after 2016? *a. y= 1.2(0.92)^tb. y= 1.2 (8)^tc y= 1.2(0.08)^td. y=1.2(1.08)^t PLEASE HELP ME OUT! QUICK POINTS FOR YOU!All information needed can be found in the image belowThank you in advance. Drag each label to the correct location on the image.Here is an addition sentence:13 + (12 + 3) = 28Drag the numbers and the parentheses to create an equivalent addition sentence that illustrates the associative property of addition.these are the stuff( ) 13 12 3 28 Blank + Blank+Blank= Help! Best answer gets brainliest! help help like rn pls!!!! What is the value (Shown in the picture) of f(81)? Were Japan and the United States able to reach a compromise and work to negotiate new terms between the two countries? 6C + 47M=893.5025C + 22M=527.86 PLEASE HELP ME AND Ill GIVE BT WITH 20 points 7. If you were unsuccessful in locating the epicenter, describe how you could modifyseismograph resources to find the epicenter successfully. --_____ es esto?--Es un disco compacto. GIVING EASY BRAINLIEST PLEASE HELP!!-if you answer correctly ill give you brainliest which will give you 26pts- Triangle ABC is similar to triangle DEF. how long is EF?A) 4B) 10C) 14D) 12 A national standardized test is graded on a scale from 1 to 5. The scores for a particular school are given below. If astudent is chosen at random, what is the probability that they scored a 4 or a 5?O A. 22.5%OB. 45%C. 60%D. 75%E. 90 Yesterday, the temperature at noon was 12.8F. By midnight, the temperature had decreased by 14.3 degrees. What was the temperature at midnight?