Chem 065 - Introductory General Chemistry » Winter 2024 » Chapter 3 Quiz

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Question #1
Gold is a(n)
A.   homogeneous mixture.
B.   element.
C.   heterogeneous mixture.
D.   none of these.
E.   compound.
Question #2
Which of the following is a physical property of both liquids and gases?
A.   has strong interactions between its particles
B.   has a definite volume
C.   has its own shape
D.   has large spaces between molecules
E.   has randomly arranged particles
Question #3
Which of the following would NOT be a physical change?
A.   burning gasoline in a lawnmower
B.   freezing water to make ice cubes
C.   melting gold to make jewelry
D.   tearing a piece of aluminum foil
E.   boiling water for soup
Question #4
A temperature of 41 °F is the same as
A.   42 °C.
B.   310 °C.
C.   5 °C.
D.   16 °C.
E.   16 °C.
Question #5
An energy diagram that shows the reactants having less energy than the products illustrates an:
A.   isothermic reaction
B.   impossible reaction.
C.   endothermic reaction
D.   exothermic reaction
Question #6
When methane is burned with oxygen, the products are carbon dioxide and water. If you produce 38 grams of water and 10 grams of carbon dioxide from 10 grams of oxygen, how many grams of methane were needed for the reaction? No need to include unit in the answer. 
A.   39
B.   41
C.   40
D.   38
Question #7
How many calories are required to increase the temperature of 13 g of alcohol from 11 °C to 23 °C? The specific heat of alcohol is 0.588 cal/g °C.
A.   92 cal
B.   0.54 cal
C.   83 cal
D.   0.63 cal
E.   170 cal
Question #8
Raising the temperature of 10.0 g of water from 10.0 °C to 20.0 °C requires 100.0 cal of energy, while raising the temperature of 10.0 g of aluminum from 10.0 °C to 20.0 °C requires 22 cal. More calories are required to heat the water because
A.   ten grams of water occupies a larger volume than 10.0 g of aluminum.
B.   water has a greater potential energy than aluminum.
C.   10.0 °C is closer to the melting point of water than to the melting point of aluminum.
D.   water has a larger specific heat than aluminum.
E.   water is a liquid and aluminum is a solid at 10.0 °C.
Question #9
650. J is the same amount of energy as
A.   155 cal.
B.   2.72 cal.
C.   1550 cal.
D.   2720 cal.
E.   650 cal.

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