# 2 pt 3 pt 4 pt 5pt 1 pt 2 pt 3 pt 4 pt 5 pt 1 pt 2pt 3 pt 4pt 5 pt 1pt 2pt 3 pt 4 pt 5 pt 1 pt 2 pt 3 pt 4pt 5 pt 1pt Chapters12Chapters 14Chapter 15Chapter.

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2 pt 3 pt 4 pt 5pt 1 pt 2 pt 3 pt 4 pt 5 pt 1 pt 2pt 3 pt 4pt 5 pt 1pt 2pt 3 pt 4 pt 5 pt 1 pt 2 pt 3 pt 4pt 5 pt 1pt Chapters12Chapters 14Chapter 15Chapter 16Chapters13

12.7g Cu produced 38.1 g Ag. What is the percent yield of sliver in this reaction? Cu+2AgNO3  Cu(NO3)+ 2Ag A)56.7% B)77.3% C)88.2% D)176%

What is 88.2%

According to the kinetic theory, collisions between molecules in a gas ____. A) are perfectly elastic B) are inelastic C) never occur D) cause a loss of total kinetic energy

What is Perfectly Elastic

What is the percent yield of the reaction if 9.9g 2Pb(No3)2 are heated to giver 5.5g of PbO? 2Pb(NO3)2(s)  @PbO(s) + O2(g) A) 44% B) 56% C)67% D)82%

What is 82 %

Which of the following statements is part of the kinetic theory? A)The particles of a gas move independently of each other. B) The particles in a gas move rapidly. C) The particles in a gas are relatively far apart. D) all of the above

What is all of the above.

Which of the following statement is not true, according to the kinetic theory? A)There is not attraction between particles of gas. B)Only particles of matter in the gaseous state are in constant motion C)The particles of a gas collide wit each other and with other objects D)All of the statements are true

What is Only particles of matter in the gaseous state are in constant motion.

What instrument is normally used to measure atmospheric pressure? A) Thermometer B) Barometer C) Vacuum D) Manometer

What is a Barometer

What is the SI unit of pressure? A) candela B) mole C) pascal D) Newton

What is Pascal

Standard conditions when working with gases are defined as __? A)0 K and 101.3 kPa B) 0 K and 1 kPa C) 0 C and 101.3 kPa D) 0 C and 1 kPa

What is 0 K and 101.3 kPa

What causes gas pressure in a container such as a helium balloon? A)The walls of the container B) The vacuum maintained in the container C) The simultaneous collisions of fast-moving particles in the container D) Atmospheric pressure acting on the outside walls of the container

What is the simultaneous collisions of fast-moving particles in the container

With which temperature scale is temperature directly proportional to average kinetic energy? A)Celsius B)Fahrenheit C)Kelvin D)Centigrade

What is kevlin

How is the ideal gas law usually written? A)PV= R nT B) PV = nR T C) PV = nRT D) P = nRT V

What is PV= nRT

Which law can be used to calculate the number of moles of a contained gas? A)Boyles law B) combined gas law C) ideal gas law D) Charles law

What is ideal gas law

What happens to the partial pressure of oxygen in a sample of air if the temperature is increased? A)It increases B) It stays the same C) It decrease. D) the change cannot be determined

What is it stays the same

Which of the following gases will effuse the most rapidly? A) bromine B) chlorine C) ammonia D) hydrogen

What is hydrogen

Which of the following atoms would have the greatest velocity if each atom had the same kinetic energy ? A) bromine B) chlorine C) ammonia D) hydrogen

What is ammonia

Which of the following gases is the best choice for inflating a balloon that must remain inflated for a long period of time? A)Argon B)Oxygen C)Hydrogen D)Neon

What is oxygen

What causes waters low vapor pressure? A) dispersion forces B) covalent bonding C) hydrogen bonding D) ionic attractions

What is hydrogen bonding

What is the shape of the water molecule? A) liner B) tetrahedral C) trigonal planer D) bent

What is bent.

Which of the following is primarily responsible for holding water molecules together in the liquid states. A)Dispersion forces B) Hydrogen bonds C) Ionic bonds D) Polar covalent bonds

What is hydrogen bonds

Surface tension is ___? A)Is the inward force which tends to minimize the surface area of liquid B) may be increased by detergents C)Is decreased by hydrogen bonding D) causes beads of water to spread out.

What is the inward force which tends to minimize the surface area of liquid

The fact that ice is less dense than water is related to the fact that ___? A) the molecular structure of ice is much less orderly than that of water B) the molecules of ice are held to each other by covalent bonding C) ice has a molecular structure in which water molecules are arranged randomly D) ice has a molecular structure that is an open framework held together by hydrogen bonds

What is the molecular structure of ice is much less orderly than that of water

What is the number of Kg of solvent in a molar solution containing 5.0 grams of solute? (Molar mass = 30g) A)0.24k B) 2.4k C) 0.11k D) 1.1k

What is 0.24k

To which of the following variables is change in a boiling point directly proportional? A)Morality of solution B) molality of solution C) percent by volume of solution D) percent (mass/mass) of solution

What is percent volume of solution

What is the freezing point of a solution of 0.5 mol of LiBr in 500 mL of water? (Kf=1.86 C/m) A)-1.86 C B) -3.72 C C) -5.58 C D) -7.44 C

What is – 1.86 C

What is the molality of a solution of water and KCL if the freezing point of the solution is -3 C? (Kf=1.86 C/m; molar mass of water =18 g) A)0.6m B)1.2m C) 0.8m D)6m

What is 1.2 m

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