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Math Supplement Quiz 1
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1

Walking fast can consume 5.0 kcal per minute. How many hours of exercise are required to consume 450 kcal, the energy in a large candy bar?
A)2.5 hr
B)1.25 hr
C)1.75 hr
D)1.5 hr
E)1 hr
2

Given the following densities at 25°C magnesium: 1.7 g/cm3 graphite: 1.8 g/cm3 iron: 7.9 g/cm3 A block of iron has a mass of 819 g. What is the mass of a block of magnesium that has the same volume as the block of iron?
A)1.1 x 103 g
B)3.8 x 103 g
C)1.8 x 101 g
D)2.8 x 103 g
E)none of them
3

9.50 x 10-1 kg converted to the basic unit (with no prefix) and expressed in standard exponential notation to the proper number of significant digits is:
A)0.95 kg
B)9.50 x 102 g
C)950 g
D)9.5 x 105 mg
E)9.5 x 102 g
4

Calculate the volume of 450 g of gold (density = 19.3 g/cm3)
A)23.3 cm3
B)8685 cm3
C)19.3 cm3
D)45.0 cm3
5

Convert 240 K and 468 K to the Celsius scale.
A)513 °C and 741 °C
B)-33 °C and 195 °C
C)-59.4 °C and 351 °C
D)-18.3 °C and 108.3 °C
6

A sample of lead shot weighing 343.6 g was added to a graduated cylinder partially filled with isopropyl alcohol (enough to immerse the lead completely). As a result, the alcohol level rose 30.3 mL. What is the density of the lead in SI units? (The density of isopropyl alcohol is 0.785 g/cm3)
A)1.13 x 104 kg/m3
B)11.3 kg/m3
C)1.44 x 104 kg/m3
D)8.9 x 103 kg/m3
7

At what temperature do the Celsius and Fahrenheit readings have the same numerical value?
A)13.9°
B)45°
C)-40°
D)-60°
8

The recommended daily allowance (RDA) of calcium is 1200 mg. Calcium carbonate contains 12% calcium by mass. How many grams of calcium carbonate are needed to provide the RDA of calcium?
A)1.3 g
B)1.4 g
C)0.14 g
D)10 g
E)0.19 g
9

An office is 4.44 m. long, 3.48 m. wide, and 2.53 m high. The average density of air is 1.29 x 10-3 g/cm3. What is the mass (in kilograms) of the air in the office?
A)5.04 x 10-5
B)0.00135
C)0.0504
D)1.35
E)50.4





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