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The density of aluminum is 27 gcm3 What is the mass of a piece of aluminum foil which is

The density of aluminum is 27 gcm3 What is the mass of a piece of aluminum foil which is

The density of aluminum is 2.7 g/cm3.  What is the mass of a piece of aluminum foil which is 10.0 cm by 5.0 cm by 0.0018 cm thick?

A)  0.090 g    B)  3.3 ? 10-2 g    C)  0.24 g    D)  1.4 ? 102 g    E)  19 g

 

62.              If the density of a certain alcohol is 0.785 g/mL, what mass of the alcohol would have a volume of 200.0 mL?

A)  2.55 g    B)  157 g    C)  200 g    D)  255 g    E)  3.92 ? 10–3 g

 

63.              A student exploring the desert finds a piece of metal with a volume of 29.9 cm3.  If this metal has a mass of 337.5 g, which of the following is the metal most likely to be?

A)aluminum (density = 2.70 g/cm3)

B)sodium chloride (density = 2.16 g/cm3)

C)lead (density = 11.3 g/cm3)

D)gold (density = 19.3 g/cm3)

E)The student discovered a new metal with a density of 0.0886 g/cm3.

 

64.              If a child's balloon filled with helium were heated with a blow-dryer, the balloon would increase in volume.  What would happen to the density of the helium in the balloon?

A)It would decrease.

B)It would increase.

C)It would remain the same.

D)A chemical reaction would occur, so it is impossible to predict.

E)The initial statement is incorrect—the volume of the balloon would not increase.

 

65.              A rubber stopper sinks in water, but floats in methylene chloride.  Place these three substances in order from least density to greatest density.

A)rubber stopper

B)rubber stopper

C)water

D)water

E)methylene chloride

 

66.              A diamond will float in water, but sink in carbon tetrachloride.  Place these three substances in order from least density to greatest density.

A)water

B)diamond

C)carbon tetrachloride

D)diamond

E)water

 

67.              An ice cube will sink in hexane, but float in water.  Place these three substances in order from least density to greatest density.

A)ice D)water

B)hexane E)water

C)hexane

 

68.              If the temperature of a bowl of ice cream increases from -10?C to 25?C, what is the increase in temperature in units of degrees Celsius and Kelvin?

A)15?C, 288 KD)35?C, 35 K

B)35?C, 308 KE)15?C, 273 K

C)35?C, 273 K

 

69.              If the temperature of water in a freezer decreases from 22?C to -25?C, what is the decrease in temperature in units of degrees Celsius and Kelvin?

A)47?C, 320 KD)3?C, 276 K

B)47?C, 273 KE)3?C, 3 K

C)47?C, 47 K

 

70.              Which of the following is not an example of a physical property?

A)The boiling point of acetone is 56?C.

B)Sand is more dense than water.

C)Helium is a gas at room temperature.

D)Copper gets a greenish coating on it when exposed to moist air.

E)Water is colorless.

abhinav behal 15-Feb-2020

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