Review Math in Chemistry

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

A student measured two times the mass of a graduated cylinder. The results were the following:

Trial 1: 24.3 g

Trial 2: 21.4 g

The graduated cylinder has an accepted mass of 22.5 g. Calculate the percent error for trial 2 using the correct number of significant figures.

• 0.0800 %

• 8.00 %

• 4.89 %

• -0.0489%

Four teachers collected the data table shown in the image.

Each teacher took three volume readings of a liquid. The actual volume of the liquid was 80.0 mL.

Which teacher’s measurements were both precise and accurate?

• Teacher 1

• Teacher 2

• Teacher 3

• Teacher 4

A person drives 33 miles per hour how many kilometers per minutes does the person drive? (Hint: 1 mile= 1.6 km) Identify the correct t-chart.

• A

• B

• C

• D

How many microliters in 225 milliliters? Identify the correct t-chart.

• A

• B

• C

• D

How many g in 65 kg? Identify the correct t-chart.

• A

• B

• C

• D

To make 1 dozen cup cakes a baker needs 4 cups of flour. For every 2 cups of flour ½ cup of oil is needed. For every ½ cup of oil, 6 tablespoons of almonds are used. In one bag of almonds there are 12 tablespoons. How many bags of almonds did the beaker need to make 5 dozen cup cakes?

• 5 bags

• 10 bags

• 29 bags

• 40 bags