Chemistry Math Skills

The value for 8.1600 x 10³ written in standard notation and with the correct number of significant figures is ________.

• 8160.0

• 81600

• 81600.

• 8160.00

The value for 9.2200 x 10^-2 written in standard notation and with the correct number of significant figures is ________.

• 92200

• 0.0922

• 92200.

• 0.092200

Express the number 0.007381 in scientific notation.

• 7.381 x 10³

• 7.381 x 10^-3

• 7.381

• 7381

Express the number 77590 in scientific notation.

• 7.759 x 10⁴

• 7.759 x 10^-4

• 7.7590 x 10³

• 7.7590 x 10^-3

Alexis calculated the density of an unknown substance. The answer was 33.0750 g/mL. Which answer shows the density rounded to four significant figures?

• 33.075 g/mL

• 33.07 g/mL

• 33.08 g/mL

• 33.10 g/mL

Complete the following calculation. Round your answer to the correct number of significant figures.

(4.55-3.1) / 1.25 =

• 1.2

• 1.16

• 1.0

• 1.12

Complete the following calculation. Round your answer to the correct number of significant figures.

45 min + 12.33 min + 3.10 min = ______ min

• 60.43

• 60.4

• 61

• 60.

The metric prefix "kilo" means __?__.

• one tenth  (0.1)
• one thousandth  (0.001)
• one hundred  (100)
• one thousand  (1,000)

What SI unit is used to measure length?

• meters
• liters
• candelas
• kilograms

What is the metric prefix for milli?

• h
• he
• k
• m