Name:    Practice Test 1B

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) 0.003 D) 0.00321

4.

The mass of a pill is 550 mg.  What is this mass in kg?
 A) 5.50 x 105 kg B) 5.50 x 10–1 kg C) 5.50 x 108 kg D) 5.50 x 10–4 kg

5.

Which of the following is the correct answer for the mathematical operation shown below?

 A) 1014 B) 102 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)
 A) 137 B) 11.4 C) 21.3 D) 454

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.
 A) 38 B) 130 C) 95 D) 62

12.

The density of copper is 8.92 g/cm3.  The mass of a piece of copper with a volume of 9.5 cm3 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?
 A) 25 B) 12 C) 540 D) 12000

15.

The correct answer for the operation shown below is:

(3.00 x 102)(1.200 x 104) =
 A) 3.6 x 106 B) 3.60 x 106 C) 3.600 x 108 D) 3.6 x 108