Chapter 1 and 2 practice questions

For the following measured numbers, the number of significant figures is indicated in parentheses. Which is incorrect? 2038 (four) 40.04 (two) 0.0130 (three) 0.00142 (three) 4 × 102 (one)

40.04 (two)

If there are six iggs per ogg and three oggs per id, how many iggs are in four ids?

72

What is the volume of a bar of metal with the dimensions 2.0 m × 20. dm × 20. cm?

8.0 × 10^2 dm^3

How many µg are in 0.0134 g? 1.34 x 10⁻⁴ 1.34 × 10⁻⁶ 1.34 1.34 × 10⁶ 1.34 × 10⁴

1.34 × 10^4

Which of the statements below gives the correct relationship between units? 10 mg < 1 dg 100 m < 1 cm 10 ks < 1000 s 1000 mA < 1 nA 100 mg > 1 g

10 mg < 1 dg

5.00 in. is _______ mm.

127

Perform the indicated operations, expressing the answer to the proper number of significant figures. 13.236 L + 6.2 L − 5.28 L =

14.2 L

Which set of measurements on a 2.00-gram standard is the most precise? 2.00 g, 2.01 g, 1.98 g 2.10 g, 2.00 g, 1.95 g 2.10 g, 2.20 g, 2.15 g 1.50 g, 2.00 g, 2.50 g

2.00 g, 2.01 g, 1.98 g

Which of the following is the smallest mass? 25 kg 2.5 × 10⁻² Mg 2.5 × 10¹⁵ pg 2.5 × 10⁹ fg 2.5 × 10¹⁰ ng

2.5 × 10^9 fg

If an athlete runs a 10.00-sec 100.0-yd dash, what is his/her speed in miles per hour? (One mile is 1,760 yards.) 20.45 miles per hour 4.889 miles per hour 0.2541 miles per hour 0.3409 miles per hour

20.45 mph

The high temperature during a summer day was observed to be 92°F. What was this temperature in °C?

33

Which of the following is not a state of matter? gas solid liquid vacuum

vaccum

Which of the following is not a state of matter? gas solid liquid vacuum

Vaccum

Which of the following is a pure substance? air nitrogen blue-cheese salad dressing concrete

nitrogen

Which of the following does not represent a physical property? boiling point color reaction with oxygen density sugar dissolving in water

reaction with oxygen

Which one of the following has been the most extensively tested? law hypothesis theory

Law

Which of the following is a homogeneous mixture? iron filings in sand fog gasoline dirt muddy water

gasoline

Pick the chemical change that occurs when a lit match is held under a piece of metal. match burns metal getting hot water condenses on the metal smoke deflecting light

match burns