Intro to Chem - Math and Measurement

During a laboratory experiment, a sample of aluminum is found to have a mass of 12.50 grams and a volume of 4.6 milliliters. What is the density of this sample, expressed to the correct number of significant figures?

• 2.717 g/mL

• 2.72 g/mL

• 3 g/mL

• 2.7 g/mL

Expressed to the correct number of significant figures, the sum of two masses is 445.2 grams. Which two masses produce this answer?

• 210.10 g + 235.100 g

• 210.100 g + 235.10 g

• 210.10 g + 235.10 g

• 210.1 g + 235.1 g

The measurement 0.41006 grams, rounded to three significant figures, is expressed as

• 0.41

• 0.410

• 0.4100

• 0.4101

Which measurement contains three significant figures?

• 0.05 g

• 0.056 g

• 0.050 g

• 0.0563 g

A student determined in the laboratory that the percent by mass of water in CuSO•5H₂O is 40.0%. If the accepted value is 36%, what is the percent of error?

• 0.11 %

• 1.1 %

• 11 %

• 4.0 %

Tags

NGSS.MS-PS1-2

In scientific notation 0.004051 is equal to:

• 4.051 × 10³

• 4.051 × 10⁻³

• 40.51 × 10⁻⁴

• 0.4051 × 10⁴

Write 4.82 x 10³ in standard form.

• 0.00482

• 0.0482

• 482.0

• 4820.0

Convert 469.1 mg to g

• 469,100

• 0.4691

• 46,910

• 46.91

2200 m is equal to

• 0.0022 km

• 2,200,000 km

• 22 km

• 2.2 km

A container holds 3.5 liters. How many centiliters does the container hold?

• 35 cL

• 0.35 cL

• 350 cL

• 0.035 cL