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

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Question #1
Gold is a(n)
A.   element.
B.   heterogeneous mixture.
C.   none of these.
D.   homogeneous mixture.
E.   compound.
Question #2
Which of the following is a physical property of both liquids and gases?
A.   has randomly arranged particles
B.   has large spaces between molecules
C.   has a definite volume
D.   has strong interactions between its particles
E.   has its own shape
Question #3
Which of the following would NOT be a physical change?
A.   boiling water for soup
B.   melting gold to make jewelry
C.   burning gasoline in a lawnmower
D.   freezing water to make ice cubes
E.   tearing a piece of aluminum foil
Question #4
A temperature of 41 °F is the same as
A.   16 °C.
B.   42 °C.
C.   16 °C.
D.   310 °C.
E.   5 °C.
Question #5
An energy diagram that shows the reactants having less energy than the products illustrates an:
A.   impossible reaction.
B.   isothermic 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.   38
B.   40
C.   39
D.   41
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.   170 cal
B.   0.54 cal
C.   83 cal
D.   92 cal
E.   0.63 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.   water is a liquid and aluminum is a solid at 10.0 °C.
B.   water has a larger specific heat than aluminum.
C.   water has a greater potential energy than aluminum.
D.   10.0 °C is closer to the melting point of water than to the melting point of aluminum.
E.   ten grams of water occupies a larger volume than 10.0 g of aluminum.
Question #9
650. J is the same amount of energy as
A.   650 cal.
B.   2720 cal.
C.   2.72 cal.
D.   155 cal.
E.   1550 cal.

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