Sig Fig Review

How many significant figures are in the following number? 100.05

• 2

• 3

• 4

• 5

How many sig figs are in 200,000,000?

• 1

• 3

• 9

Which of the following numbers has 4 sig figs?

• 2,000

• 20.00

• 2,010

• 0.0020

Avogadro's number is -- and has how many sig figs?

• 6.02 x 10²³, 24 sig figs

• 6.02 x 10²³, 3 sig figs

• 6.02 x 10²³, 23 sig figs

• 6.02 x 10²³, 2 sig figs

R, the ideal gas constant, has how many sig figs? 0.0821

• 5

• 4

• 3

• 2

How many sig figs are in 0.04500?

• 6

• 5

• 4

• 2

A student measures a volume of 100 mL in an Erlenmeyer flask. How many sig figs are in this measurement? And which piece of equipment could this student use to be more precise?

• 1; graduated cylinder

• 3; graduated cylinder

• 1; beaker

• 3; beaker

Determine the density of an object with a mass of 10 grams and a volume of 5.00 mL.

• 2.00 g/mL

• 2.0 g/mL

• 2 g/mL

• 0.5 g/mL

Which of the following numbers have 3 sig figs?

• 0.00301

• 0.00300

• 300

• 300.

Which of the following numbers does not have 2 sig figs?

• 20.0

• 0.0020

• 20

• 24,000