Name:    Practice Test 1A

Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.

1.

A 35-g sample of potassium completely reacts with chlorine to form 67 g of potassium chloride.  How many grams of chlorine must have reacted?
 A) 67 g B) 12 g C) 35 g D) 32 g

2.

3.914 cm + 243.10 cm + 12.0046 cm =
 A) 259.02 cm B) 259.019 cm C) 259.0 cm D) 259.0186 cm

3.

37.4 cm x 2.2 cm equals
 A) 82 cm2 B) 82.28 cm2 C) 82.3 cm2 D) 82.2 cm2

4.

What is the mass of 225 mL of a liquid that has a density of 0.880 g/mL?
 A) 0.256 g B) 0.198 g C) 198 g D) 0.0039 g

5.

How many significant figures does the measurement 0.0048 cm contain?
 A) 1 C) 4 B) 3 D) 2

6.

42.0 °C is equivalent to
 A) 5.55 °F B) 273 K C) 108 °F D) 53.3 °F

7.

If iodine melts at 114 ºC and boils at 184 ºC, what is its physical state at 130 ºC?
 A) gas B) solid C) liquid D) cannot be determined

8.

The mass of a block is 9.43 g and its density is 2.35 g/cm3.  The volume of the block is
 A) 2.49 cm3 B) 22.2 cm3 C) 0.249 cm3 D) 4.01 cm3

9.

An automobile travels 97.2 km on 7.88 L of gasoline.  What is the gas mileage for the automobile in miles per gallon?
 A) 2.02 mi/gal B) 0.034 mi/gal C) 29.0 mi/gal D) 7.67 mi/gal

10.

What is the edge length of a 155-g iron cube? (Density of iron is 7.86 g/cm3)
 A) 2.70 cm B) 19.7 cm C) 1218 cm D) 0.0197 cm

11.

When 20.0 g of mercury is heated from 10.0 °C to 20.0 °C, 27.6 J of energy are absorbed.  What is the specific heat of mercury?
 A) 0.726 J/g°C B) 552 J/g°C C) 2.76 J/g°C D) 0.138 J/g°C

12.

Which of the following is NOT a characteristic of solutions?
 A) a heterogeneous mixture B) a homogeneous mixture C) variable composition D) contains 2 or more substances

13.

A theory is
 A) a hypothesis that has been tested and validated over a long period of time B) a law that is yet to be tested and validated C) a law that has been validated by several international scientific organizations D) a hypothesis that is yet to be tested and validated

14.

Which of the following is a physical change?
 A) a piece of sulfur is burned B) a nail rusts C) a firecracker explodes D) a rubber band is stretched