CHEM 103 Module 1 | 2026 Update | Practice Questions and Answers

CHEM 103 Module 1.pdf Page 1 of 13 CHEM 103 Module 1.pdf




CHEM 103 Module 1

Before taking the Module 1 Exam you should be able to:

● Convert numbers between exponential and ordinary form
● Perform metric and English unit conversions
● Perform temperature conversions
● Perform density calculations
● Determine significant figures
● Identify elements, compounds, and mixtures
● Identify physical and chemical changes
● Understand basic atomic structure
● Name and write formulas for common inorganic compounds


1. Exponential and ordinary form - moving decimals. (- backward) or positive
exponent forward. 8360000 = 8.36 x 106 and 0.000742 = 7.42 x 10-4
2. Metric and English Unit Conversions
a. 1 kilogram = 1000 grams, 1 kl = 1000g
b. 4 quarts = 1 gallon , 4qt = 1 gal
c. 1 liter = 1000 milliliter , 1L = 1000ml
d. 1 gram = 100 centigram , 1g = 100cg
e. 10 decimeter = 1 meter, 10dm = 1m
f. 1 lb = 16 oz
g. 12 in = 1 ft
NEW UNIT ON TOP OLD UNIT ON BOTTOM
48 ounces to lbs = 48 x 1lb
— = 3 pounds
16ounces

Multiply number on top


1) 656 cm = ? meters
656 x1 meters
—-------= 6.56
100

2) 20 gal = ? quarts
20 x 4
—--80 qts




CHEM 103 Module 1.pdf CHEM 103 Module 1.pdf 2026/2027

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1gal

3) 7820 ml = ? liters
7820 x 1 liter
—--- = 7.82 liters
1000 ml

4) 36 g = ? mg
36 x 1000 mg
—-- = 36000 mg
1g

5) 6.2 m = ? mm
6.2 x 1000 mm
—---------------- = 6200mm
1m

6) 725 L = ? ml
725 x 1000ml
—------------- = 725000ml
1L



Answer Key
1) 656 cm x 1 m / 100 cm = 6.56 m
2) 20 gal x 4 qt / 1 gal = 80 qts
3) 7820 ml x 1 liter / 1000 ml = 7.82 liters
4) 36 g x 1000 mg / 1 g = 36000 mg
5) 6.2 m x 1000 mm / 1 m = 6200 mm
6) 725 L x 1000 ml / 1 liter = 725,000 ml


3. Temp conversions




CHEM 103 Module 1.pdf CHEM 103 Module 1.pdf 2026/2027