CHEMISTRY POST-TEST/FINAL EXAM REVIEW

Which of these measurements has been expressed to four significant figures?

• 0.0420 cm

• 4020 cm

• 40200 cm

• 0.04020 cm

What is the density of silver if a sample has a mass of 46.16 g and occupies a volume of 4.40 mL?

• 10.49 g/mL

• 12.00 g/mL

• 41.8 g/mL

• 203 g/mL

How many significant figures?

1000

• 1

• 2

• 3

• 4

Which of these measurements has been expressed to two significant figures?

• 0.040 cm

• 4020 cm

• 42.00 cm

• 0.02 cm

Which of these measurements has been expressed to three significant figures?

• 0.040 cm

• 4020 cm

• 42.00 cm

• 0.02 cm

How many significant figure in 0.007?

• 4
• 3
• 1
• 0
• 2

Solve and give your answer with the correct number of significant figures
(12.470)(2.73)

• 34.043

• 34

• 34.04

• 34.0

A 42.44 gram metal causes water to displace from 40.0 mL to 42.2 mL, what is the metal's density (D = m/v)?

• silver 10.49 g/cm³

• gold, 19.3 g/cm³

• aluminum, 2.70 g/cm³

• iron, 7.9 g/cm³

A rock has a mass of 50.0 grams and a volume of 30.0 cm³. What is the density of the rock?

• 0.6 g/cm³

• 1500 g/cm³

• 80 g/cm³

• 1.67 g/cm³

Which of these is not evidence of a chemical reaction?

• A gas is given off

• The material dissolves

• Heat is released

• A precipitate forms

Tags

NGSS.MS-PS1-2