Unit 1 Chemistry Review Quiz

A piece of metal has a mass of 25.0 g and a volume of 3.20 mL. What is the density of the metal?

• 7.81 g/mL

• 8.25 g/mL

• 7.50 g/mL

• 7.95 g/mL

A physicist measured the length of a 10.00cm rod using a vernier caliper and obtained the values 10.02cm, 9.98cm, and 10.01cm. These measurements indicate

• good precision, but poor accuracy.

• good accuracy, but poor precision.

• poor precision and poor accuracy.

• good accuracy and good precision.

When darts are scattered randomly across the dartboard and none are near the bullseye, this demonstrates:

• Low accuracy and low precision

• High accuracy and high precision

• Low accuracy and high precision

A laboratory experiment is conducted, and the measured value is 0.90 grams. If the true value is 1.00 grams. What is the percent error?

• 10%

• 9.09%

• 8.5%

• -10%

What should you do first if a chemical spill happens in the lab?

• Leave the area immediately

• Report it to the teacher and follow their instructions

• Attempt to clean it up yourself

• Ignore it and continue working

How many significant figures are in the following number: 0.004020?

• 7

• 6

• 5

• 4

A liquid has a mass of 300 grams and fills a container with a volume of 600 mL. What is the density of the liquid?

• 0.5 g/mL

• 1.0 g/mL

• 1.5 g/mL

• 2.0 g/mL

What is the density of a substance that has a density of 1.5 g/cm³?

• 1.5 g/cm³

• 0.8 g/cm³

• 2 g/cm³

• 0.5 g/cm³

7.050 cm X 2.25 cm =

• 15.9 cm²

• 15.8625 cm²

• 10.3 cm²

• 10.3 cm

What is the FIRST action you should take if an accident occurs in the lab?

• Inform your lab partner

• Inform the teacher

• Run away

• Ignore it