Question : 51.A balloon at 25oC has 1.00 L of air. The : 1318398

51.A balloon at 25oC has 1.00 L of air. The balloon is heated to 40oC at constant pressure. What is the new volume?

A)  1.00 ? 103 L    B)  1.05 L    C)  1.60 L    D)  15.0 L    E)  2.25 L

52.A balloon containing helium at constant pressure and temperature has the volume doubled by adding a more helium. Which statement(s) is(are) true?

A)The number of helium atoms doubled.

B)The number of moles of helium doubled.

C)The mass of helium in the balloon doubled.

D)All of the statements are true.

E)Statements A, B, and C are false.

53.What mass of helium is contained in a 2.0 L balloon at 30.0oC and 735 mm Hg?

A)  26.5 g    B)  0.477 g    C)  514 g    D)  66.1 g    E)  0.312 g

54.Which of the following is a statement of Dalton’s law of partial pressure?

A)The total pressure of a mixture of gases is the sum of the partial pressure of each gas that makes up the mixture.

B)The partial pressure of a gas is equal to the total pressure of the mixture.

C)Gases can exist as mixtures at STP only.

D)The total pressure of a mixture of gases is the product of the partial pressures of each gas in the mixture.

E)In a mixture of two gases, the pressure of each gas is the ½ the total pressure.

55.Which statement is true concerning an ideal gas?

A)Gases behave more ideally at low temperatures than at high temperatures.

B)Polar molecules are more ideal than nonpolar molecules.

C)Gases behave more ideally at low pressure than at high pressure.

D)Both statements A and B are true.

E)Both statements B and C are true.

56.Glycerol is a very polar compound. Dimethyl ether is only slightly polar. Which statement is true?

A)Glycerol is less viscous than dimethyl ether.

B)Glycerol will have a greater surface tension than dimethyl ether.

C)Dimethyl ether has a lower vapor pressure than glycerol.

D)The viscosity of both substances will increase with increasing temperature.

E)Glycerol will evaporate at a faster rate than dimethyl ether.

57.Which of the following is true for a liquid that is placed in a sealed container?

A)Evaporation of the liquid cannot occur.

B)Once equilibrium is established between the liquid and the vapor, the rate of the evaporation process will equal the rate of condensation.

C)All molecules stay in the liquid state.

D)Condensation of the evaporated molecules in the jar can only occur once all of the liquid molecules are in the vapor (or gaseous) state.

E)A set vapor pressure will be reached, which is the same at all temperatures.

58.Which substance is expected to have the highest boiling point?

A)  CO2    B)  HCl    C)  CH3OH    D)  CH4    E)  BF3

59.Which statement about a crystalline solid is always true?

A)A crystalline solid has a regular repeating structure of the atoms, ions, or molecules which make up the solid.

B)A crystalline solid will always have a high melting point.

C)A crystalline solid will always have a low melting point.

D)A crystalline solid contains only ionic bonds.

E)A crystalline solid is another name for an amorphous solid.

60.Which property is typical for molecular solids?

A)consist of only metal atomsD)have no organized structure

B)contain ionic and covalent bondsE)will boil at very high temperature

C)have low melting points