Multiple Choice


1.

Which of the following statements is true?
A)  Element, compounds and some mixtures are pure substances.  B)  Element, but not
compounds are pure substances.  C)  Both elements and compounds are pure
substances.  D)  Compounds, but not elements are pure substances. 


2.

Coffee is an example of
A)  a homogeneous mixture  B)  an element  C)  a
compound  D)  a heterogeneous mixture 


3.

The number 0.0030201, when rounded to 3 significant figures would appear
as
A)  0.00302  B)  0.003  C)  0.0030  D)  0.00321 


4.

The mass of a pill is 550 mg. What is this mass in kg?
A)  5.50 x 10^{5} kg  B)  5.50 x 10^{–1}
kg  C)  5.50 x 10^{8} kg  D)  5.50 x 10^{–4}
kg 


5.

Which of the following is the correct answer for the mathematical operation
shown below?
A)  10^{14}  B)  10^{2}  C)  10^{–2}  D)  10^{–9} 


6.

The specific heat of copper is 0.093cal/g °C,
and the specific heat of silver is 0.057 cal/g °C. If 100 cal of heat is added to one g of each
metal at 25 °C, what is the expected result?
A)  The copper will reach a temperature lower than 25
°C.  B)  The silver will reach a higher temperature.
 C)  The two samples will reach the same temperature.
 D)  The copper will reach a higher temperature.



7.

Which of the follwoing is a pure substance?
A)  distilled water  B)  blood  C)  air  D)  ketchup 


8.

Expressed in scientific notation and rounded to four significant figures, the
number 0.00023648 is
A)  2.364 x 10^{–4}  B)  2.365 x
10^{–4}  C)  0.2365 x
10^{–3}  D)  23.65 x
10^{–5} 


9.

Which one of the following properties describes a
liquid?
A)  fills the entire volume of the container
 B)  particles move very rapidly  C)  particles are close together and move randomly  D)  has its own shape 


10.

How many cm are in 4.50 ft? (1 in = 2.54 cm)


11.

How many calories are required to raise the
temperature of a 35.0 g sample of iron from 25 °C to 35 °C? Iron has a specific heat
of 0.108 cal/g °C.


12.

The density of copper is 8.92 g/cm^{3}. The mass of a piece of
copper with a volume of 9.5 cm^{3} is
A)  1.1 g  B)  85 g  C)  0.94
g  D)  2.6 g 


13.

267 °F is equivalent to
A)  540 K  B)  116 °C  C)  389
K  D)  404 K 


14.

The heat of vaporization for water is 540
cal/g. How many kilocalories are needed to change 22 g of liquid water to steam at 100
°C?


15.

The correct answer for the operation shown below is: (3.00 x 10^{2})(1.200 x 10^{4}) =
A)  3.6 x 10^{6}  B)  3.60 x 10^{6}  C)  3.600 x
10^{8}  D)  3.6 x 10^{8} 
