Topic I: Useful Mathematics in Chemistry

Which measurement has a total of 4 significant figures?

• 0.000500 g

• 0.00050 g

• 0.0005000 g

• 0.0005 g

What is the sum of 8.1 g + 9.90 g with correct significant figures?

• 18.0 g

• 18 g

• 18.00 g

• 1.80 x 10¹ g

MV: 26.0 mL AV: 35.00 mL

What is the % error with correct significant figures?

• 25.7 %

• 34.6%

• 26 %

• 34 %

What is 990 expressed in scientific notation with the correct number of significant figures?

• 9.90 X 10^-2

• 9.9 X 10^-2

• 9.90 X 10²

• 9.9 X 10²

What is 0.85600 expressed in scientific notation with correct significant figures?

• 8.5600 X 10¹

• 8.56 X 10^-1

• 8.5600 X 10^-1

• 8.56 X 10¹

What is the product of 7.05 X 8.010 expressed with correct significant figures?

• 56.5

• 56.47

• 56

• 56.4750

What is the volume with correct significant figures?

• 24.00 mL

• 28 mL

• 24.0 mL

• 28.00 mL

What is the mass with correct significant figures?

• 545.20 g

• 547 g

• 545.2 g

• 547.0 g

What is the density with correct significant figures if the volume is 2.09 mL and the mass is 7.0 g?

• 3 g/mL

• 0.30 g/mL

• 0.299 g/mL

• 3.3 g/mL

What procedure is safest for diluting a concentrated acid?

• Add the acid to the water slowly with steady stirring

• Add the water to the acid quickly

• Add the water to the acid slowly with steady stirring

• Add the acid to the water quickly.