Chemistry 2021 Unit 2 Test: Math in Chemistry

1,000g =

• 1kg

• 0.1kg

• 10kg

• 0.01kg

1 in =

• 2.54 cm

• 25.4 cm

• 254 cm

• 0.254 cm

1 km =

• 0.621 miles

• 6.21 miles

• 62.1 miles

• 621 miles

You know 1000 mg = 1 g.  Convert 2.5 grams into milligrams.

• 25 mg
• 25,000 mg
• 250 mg
• 2500 mg

How many kilograms of calcium are there in 173 pounds of calcium? (1 pound = 454 grams; 1 kg = 1000 g)

• 1.10 kg

• 78.5 kg

• 110 kg

• 78500 kg

Convert 62 miles/hour to feet/second

• 5,456 feet/second

• .003 feet/second

• 90.9 feet/second

• 909 feet/second

Gas costs $3.05 a gallon, and your car travels at 27 miles for each gallon of gas. How far can you travel in your car with $95 in your pocket?

• 11 miles
• 840 miles
• 7800 miles
• 870 miles

How many sig figs are there?
0.000008

• 1
• 2
• 6
• 7

How many sig figs are there?
5.00000008

• 2
• 6
• 9

How many sig figs are there?
4000.

• 1
• 3
• 4