REVIEW QUESTIONS

Chapter 2

  1. Determine the number of significant digits in each of the following numbers:
    a) 503 3
    b) 63,000
    c) 0.0051
    2
    d) 0.03002
    4
    e) 4.100
    4
    f) 0.0810 3
  2. Round each of the following numbers to 2 significant figures:
    a) 93.643
    94
    b)
    c) 12153
    12000
    d) 158.35
    160
  3. Perform the following operations with the correct number of significant digits:
    a)
    (3 sig figs)
    b)
    (3 sig figs)
    c)
    (1 decimal)
    d)
    (2 sig figs)
  4. Record each of the following measurements to the correct number of digits:
(a)
(b)
(c)
  1. Convert each of the following units:
    a) 1.78 kg to
b) 0.85 g to mg
c) 1.65 lbs to
d) to K
e) 425 F to
  1. A 13.5 mL sample of an unknown liquid has a mass of 12.4 g . What is the density of the liquid?
  1. The density of ether is . What is the mass of 1.45 L of ether?
  1. What is the capacity of a gasoline container (in gal) if it contains 117 lb of gasoline with a density of
  1. A car travels at 55 miles per hour and gets of gasoline. How many gallons of gasoline are needed for a 3.0-hour trip?
  1. Sterling silver is silver by mass with a density of . If a cube of sterling silver has a volume of , how many ounces of pure silver are present? ( )
  1. The following nutrition information is listed on a box of crackers:
Serving size: 0.5 oz (6 crackers)
Fat: 4 g per serving
Sodium: 140 mg per serving
a) If the box has a net weight of 8.0 oz , how many crackers are in a box?
b) How many grams of sodium are used to prepare 50 boxes of crackers?
(2 sig figs)