Chemistry Test #3

A 5.00-L tank contains helium gas at 1.50 atm. What is the pressure of the gas in mmHg?

A 5.00-L tank contains helium gas at 1.50 atm. What is the pressure of the gas in torr?

According to the kinetic theory of gases, a gas can be compressed much more than a liquid or solid because a. gas particles move rapidly. b. the particles of a gas are very far apart. c. gas particles do not attract or repel one another. d. gas particles move faster when the temperature increases. e. a gas is composed of very small particles.

According to the kinetic theory of gases, particles of a gas

As you rise higher in Earth's atmosphere, the atmospheric pressure

In a gas, the distance between the particles is a. fixed relative to the size of the molecules. b. close relative to the size of the molecules. c. very close relative to the size of the molecules. d. small relative to the size of the molecules. e. very large relative to the size of the molecules.

In the kinetic molecular theory of gas behavior, particles of a gas tend to move __________ and collisions between them are __________.

In the kinetic molecular theory of gas behavior, the assumption is made that gas molecules

The atmospheric pressure in Denver, CO is 633 mmHg. What is this pressure in atm?

The force of gas particles against the walls of a container is called

The unit of 1 atmosphere used to describe the pressure of a gas is equal to

Which measurement describes the pressure of a gas?

Which of the following is NOT part of the kinetic theory of gases? a. There is very little empty space in a gas. b. Gas particles move faster when the temperature increases. c. A gas is composed of very small particles. d. Gas particles do not attract or repel one another. e. Gas particles move rapidly.

/Users/kaylawatson/Desktop/f1q6g1.jpg A balloon is filled with helium gas. For the question(s) that follow, select the letter of the balloon diagram that corresponds to the given change in conditions. The balloon is put into a chamber whose pressure is less than the atmospheric pressure and at atmospheric temperature. A B C A and B B and C

/Users/kaylawatson/Desktop/f1q6g1.jpg A balloon is filled with helium gas. For the question(s) that follow, select the letter of the balloon diagram that corresponds to the given change in conditions. The temperature is changed from 50 °C to -150 °C at constant pressure. A B C A and B B and C

A gas at 5.00 atm pressure was stored in a tank during the winter at 5.0 °C. During the summer, the temperature in the storage area reached 40.0 °C. What was the pressure in the gas tank then?

A gas contained in a steel tank has a pressure of 1.5 atm at a temperature of 320 K. What will be the gas pressure when the temperature changes to 450 K?

A gas sample in a closed, expandable container of initial volume 5.00 L was allowed to warm from 25 °C to 35 °C. What was its new volume?

A sample of argon at 300. °C and 50.0 atm pressure is cooled in the same container to a temperature of 0.00 °C. What is the new pressure?

According to Boyle's Law, the pressure of a gas increases as the volume decreases because

An autoclave is used to sterilize surgical equipment because a. it allows water to boil at 100 °C at pressures less than 1 atm. b. it allows water to boil at temperatures less than 100 °C. c. it allows water to boil at temperatures above 100 °C. d. it allows water to boil at 100 °C at pressures greater than 1 atm. e. it provides very high temperatures and very low pressures.

As the temperature of a gas increases, the density of the gas will __________.

At constant temperature, a sample of helium at 760. torr in a closed container was compressed from 5.00 L to 3.00 L. What was the new pressure exerted by the helium on its container?

Complete the following statement: In Charles's Law, the volume of a gas __________ when the __________ decreases.

In Gay-Lussac's Law, the pressure of a gas increases due to an increase in temperature because

The boiling point of water at sea level is 100 °C. At higher altitudes, the boiling point of water will be a. higher, because there are fewer water molecules in the air. b. lower, because temperatures are lower. c. lower, because the atmospheric pressure is lower. d. the same, because water always boils at 100 °C. e. higher, because the altitude is greate

The pressure of 5.0 L of gas increases from 1.50 atm to 1240 mmHg. What is the final volume of the gas, assuming constant temperature?

The temperature of a 500. mL sample of gas increases from 150. K to 350. K. What is the final volume of the sample of gas, if the pressure in the container is kept constant?

The volume of a gas with a pressure of 1.2 atm increases from 1.0 L to 4.0 L. What is the final pressure of the gas, assuming constant temperature?

The volume of a sample of gas, initially at 25 °C and 158 mL, increases to 450. mL. What is the final temperature of the sample of gas, if the pressure in the container is kept constant?

Vapor pressure can be described as a. the temperature at which bubbles of vapor appear in a liquid. b. the pressure exerted by a gas above the surface of its liquid. c. the pressure within the lungs during inhalation. d. the pressure exerted on the Earth by the particles in the air. e. the temperature at which the vapor pressure of a liquid equals atmospheric pressure.

What unit of temperature is used in gas law calculations?

Which of the following correctly describes the process of inspiration (air entering the lungs)? a. The lungs contract, causing their internal pressure to decrease. b. The lungs expand, causing their internal pressure to decrease. c. There is no change in the internal pressure in the lungs. d. The lungs expand, causing their internal pressure to increase. e. The lungs contract, causing their internal pressure to increase.

1 mole of a gas occupies 22.4 L at

4Na(s) + O2(g ) → 2Na2O(s) How many L of O2 gas at STP, are needed to react with 15.0 g of Na?

A 1.20-L container contains 1.10 g of an unknown gas at STP. What is the molecular weight of the unknown gas?

A diver exhales a bubble with a volume of 250 mL at a pressure of 2.4 atm and a temperature of 15 °C. What is the volume of the bubble when it reaches the surface where the pressure is 1.0 atm and the temperature is 27 °C?

A diver exhales a bubble with a volume of 250 mL at a pressure of 2.4 atm and a temperature of 15 °C. How many gas particles are in this bubble?

A gas sample contains 4.0 g of CH4 and 2.0 g of He. What is the volume of the sample at STP?

A sample of nitrogen gas had a volume of 500. mL, a pressure in its closed container of 740 torr, and a temperature of 25 °C. What was the new volume of the gas when the temperature was changed to 50 °C and the new pressure was 760 torr?

According to Avogadro's law,

As the reaction of carbon with oxygen to produce carbon monoxide proceeds in a sealed container at a constant temperature of 600 K, the pressure in the container will __________. 2C(s) + O2(g) → 2CO(g)

At 570. mm Hg and 25 °C, a gas sample has a volume of 2270 mL. What is the final pressure (in mmHg) at a volume of 1250 mL and a temperature of 175 °C?

At STP conditions, 11 g of SO2 has a volume of

At STP, how many moles of helium would occupy 1.00 L?

At STP, temperature and pressure have the values of

At STP, what is the volume of 1.00 mole of carbon dioxide?

At STP, what is the volume of 4.50 moles of nitrogen gas?

How many atoms of neon occupy a volume of 14.3 L at STP?

How many moles of neon occupy a volume of 14.3 L at STP?

The pressure exerted by a gas on its container is directly proportional to

When the combined gas law is rearranged to solve for V2, the following is the correct expression a. T2T1V1/P2P1 b. P1V1/T1 - P2/T2 c. P1V1T2/P2T1 d. P2T2/P1V1T1 e. P1V1T1/P2T2

Zn(s) + 2HCl(aq) → H2(g) + ZnCl2(aq) When 25.0 g of Zn reacts, how many L of H2 gas are formed at STP?

Zn(s) + 2 HCl(aq) → H2(g) + ZnCl2(aq) When 25.0 g of Zn reacts, how many L of H2 gas are formed at 25 °C and a pressure of 854 mmHg?

What volume would a 0.250 mole sample of H2 gas occupy, if it had a which has a pressure of 1.70 atm, and a temperature of 35 °C?

What is the mass of a sample of O2 gas, which has a pressure of 740. mmHg, at a temperature of 25 °C, in a volume of 250. mL?

The total pressure in a mixture of gases is equal to the partial pressure(s) of

The mathematical expression of the ideal gas law is

A tank contains helium gas at 490 mmHg, nitrogen gas at 0.75 atm, and neon at 520 torr. What is the total pressure in atm?

A tank contains a mixture of helium, neon, and argon gases. If the total pressure in the tank is 490. mmHg and the partial pressures of helium and argon are 215 mmHg and 102 mmHg, respectively, what is the partial pressure of neon?

A cyclopropane-oxygen mixture is used as an anesthetic. If the partial pressure of cyclopropane in the mixture is 330 mmHg and the partial pressure of the oxygen is 1.0 atm, what is the total pressure of the mixture in torr?

A hydrogen bond is a. a covalent bond between H and O. b. an ionic bond between H and another atom. c. a bond that is stronger than a covalent bond. d. an attraction between a hydrogen atom attached to N, O, or F and an N, O, or F atom on another molecule. e. the polar O-H bond in water.

A solution is prepared by dissolving 2 g of KCl in 100 g of H2O. In this solution, H2O is the

An equivalent is a. 1 mole of an ionic compound. b. 1 mole of any ion. c. the amount of ion that carries 1 mole of electrical charge. d. the amount of ion that has a 1- charge. e. the amount of ion that has a 1+ charge.

An intravenous replacement solution contains 4.0 mEq/L of Ca2+ ions. How many grams of Ca2+ are in 3.0 L of the solution?

How many equivalents are present in 5.0 g of Al3+?

How many equivalents are present in 5.0 moles of Al3+?

Hydrogen bonds are a major factor in the structure of

In a solution, the solvent

In water, a substance that ionizes completely in solution is called a

In water, a substance that partially ionizes in solution is called a

Oil does not dissolve in water because

The O-H bond in water is polar because

Water is a polar solvent and hexane (C6H14) is a nonpolar solvent. Which of the following correctly describes the solubility of the solute?

When KCl dissolves in water a. the Cl- ions are attracted to the partially negative oxygen atoms of the water molecule. b. the Cl- ions are attracted to dissolved K+ ions. c. the K+ ions are attracted to the partially negative oxygen atoms of the water molecule. d. the K+ ions are attracted to the partially positive hydrogen atoms of the water molecule. e. the K+ ions are attracted to Cl- ions on the KCl crystal.

Which of the following molecules can form hydrogen bonds?

A patient needs to receive 85 grams of glucose every 12 hours. What volume of a 5.0%(m/v) glucose solution needs to be administered to the patient each 12 hours?

According to Henry's law, the solubility of a gas in a liquid

An increase in the temperature of a solution usually

How many grams of glucose are needed to prepare 400. mL of a 2.0%(m/v) glucose solution?

How many milliliters of a 25% (m/v) NaOH solution would contain 75 g of NaOH?

How many moles of CaCl2 are in 250 mL of a 3.0 M of CaCl2 solution?

Rubbing alcohol is 70.% isopropyl alcohol by volume. How many mL of isopropyl alcohol are in a 1 pint (473 mL) container?

The mass percent concentration refers to

The mass/volume percent concentration refers to

The molarity (M) of a solution refers to

The solubility of KI is 50 g in 100 g of H2O at 20 °C. If 110 grams of KI are added to 200 grams of H2O,

What is the concentration, in m/v percent, of a solution prepared from 50. g NaCl and 2.5 L of water?

What is the concentration, in mass percent, of a solution prepared from 50.0 g NaCl and 150.0 g of water?

What is the molarity of a solution containing 5.0 moles of KCl in 2.0 L of solution?

What is the molarity of a solution that contains 17 g of NH3 in 0.50 L of solution?

What is the molarity of a solution that contains 3.25 moles of NaNO3 in 250. mL of solution?

What is the molarity of a solution which contains 58.5 g of sodium chloride dissolved in 0.500 L of solution?

What volume (mL) of a 15% (m/v) NaOH solution contains 120 g NaOH?

What volume of a 1.5 M KOH solution is needed to provide 3.0 moles of KOH?

When 200. mL of water are added to 100. mL of 12% KCl solution the final concentration of KCl is (Assume the volumes add.)

When solutions of KCl and Pb(NO3) 2 are mixed, a precipitate forms. Which of the following is the balanced equation for the double replacement reaction that occurs? A. 2KCl (aq) + Pb(NO3) 2(aq) → 2 KNO3(aq) + PbCl2 (s) B. KNO3(aq) + PbCl2(s) → KCl(aq) + Pb(NO3) 2(aq) C. KCl(aq) + Pb(NO3) 2(aq) → KNO3(aq) + PbCl(s) D. K+(aq) + NO3-(aq) → KNO3(aq) E. KCl(aq) + Pb(NO3) 2(aq) → KNO3(aq) + PbCl2(s)

When solutions of NaCl and AgNO3 are mixed,

When some of the sugar added to iced tea remains undissolved at the bottom of the glass, the solution is

Which one of the following compounds will NOT be soluble in water? K2SO4 MgCl2 NaOH LiNO3 PbS

Which one of the following compounds will NOT be soluble in water? LiOH MgCl2 NaNO3 BaSO4 K2S

Which one of the following compounds will be soluble in water? CaSO4 LiCl AgCl Cu(OH)2 PbCO3

Which one of the following compounds will be soluble in water? NH4Cl PbS CaCO3 AgBr Ca(OH)2

1.0 mole of NaCl is added to 1.0 L of water. The freezing point of the solution will be __________ the freezing point of pure water.

A homogeneous mixture that does not settle out upon standing is

A red blood cell will undergo crenation in

A red blood cell will undergo hemolysis in

A solution that has an osmotic pressure less than that of red blood cells is called

A solution with the same osmotic pressure as the blood is

An aqueous mixture containing starch (a colloid), NaCl, glucose, and albumin (a colloid) is placed in a dialyzing bag and immersed in distilled water. Which of the following correctly describes the location of the indicated substance after dialysis? albumin, inside water inside only starch inside and outside starch outside albumin inside and outside

For the question(s) that follow, consider a 4% starch solution and a 10% starch solution separated by a semipermeable membrane. Which starch solution will decrease in volume as osmosis occurs?

For the question(s) that follow, consider a 4% starch solution and a 10% starch solution separated by a semipermeable membrane. The process that occurs in this system is

For the question(s) that follow, consider a 4% starch solution and a 10% starch solution separated by a semipermeable membrane. Which of the following occurs in this system? a. There is a net flow of water from the 4% starch solution into the 10% starch solution. b. Starch moves out of the 10% starch solution into the 4% starch solution. c. Water does not cross the membrane at all. d. There is a net flow of water from the 10% starch solution into the 4% starch solution. e. Water flows equally in both directions

In the process known as osmosis, __________ moves through a semipermeable membrane into an area of __________ concentration.

The process by which a semipermeable membrane allows water molecules, small molecules, and ions to pass through while retaining large particles is called

Which solution is isotonic to a red blood cell?

During the process of diluting a solution to a lower concentration, a. the volume of the solution does not change. b. there is more solute in the concentrated solution. c. water is removed from the concentrated solution. d. the amount of solute does not change. e. the amount of solvent does not change.

Use the reaction: 2AgNO3(aq) + H2SO4(aq) → Ag2SO4(s) + 2H2O(l) What volume of 0.123 M AgNO3(aq) is needed to form 0.657 g of Ag2SO4(s)?

What is the molarity of a KCl solution made by diluting 75.0 mL of a 0.200 M solution to a final volume of 100. mL?

What is the new mass/volume (m/v)% of a KOH solution that is prepared by diluting 110 mL of a 6% (m/v) KOH solution to 330 mL?

What volume of 0.10 M NaOH can be prepared from 250. mL of 0.30 M NaOH?

What volume of 2.5% (m/v) KOH can be prepared from 125 mL of a 5.0% KOH solution?

What volume of a 1.5 M KOH solution is needed to provide 3.0 moles of KOH?

What volume of a 2.00 M KCl solution is required to prepare 500. mL of a 0.100 M KCl solution?