Significant Matters

How many sig figs in 0.0120

• 1

• 2

• 3

• 4

Answer explanation

Shoot from the front and pop those first two zeros

Report the sum to the correct sig figs. 8.91 + 0.09

• 9

• 9.0

• 9.00

• None of these

Answer explanation

Add or subtract, least far back.

Report the product to the correct sig figs. 2.5 * 0.5

• 1

• 1.2

• 1.3

• 1.25

Answer explanation

Multiply or Divide, least total decide

Report the density of this sample to the correct sig figs if the mass is 5.8 g and volume is 10.4 mL?

• 0.5 g/mL

• 0.6 g/mL

• 0.56 g/mL

• 0.558 g/mL

Answer explanation

Multiply or Divide, least total decide

Round 5.749 to 2 sig figs.

• 5.7

• 5.8

• 5.0

• 6.0

Answer explanation

Just look one behind the # you are rounding!

Find the difference reported to the correct sig figs. 35.98 g - 34.98 g

• 1 (1 sig fig)

• 1.0 (2 sig figs)

• 1.00 (3 sig figs)

• 1.000 (4 sig figs)

Select all the numbers reported to 2 sig figs.

• 1.0

• 0.10

• 1.0E3

• 1.0E-3

You find a small sphere on the yard. Its mass is 493.25 g and its volume is 327.1 mL. Will the sphere sink or float in water?

• Sink. 327.1 / 493.25 < 1

• Float. 327.1 / 493.25 < 1

• Sink. 493.25 / 327.1 > 1

• Float. 493.25 / 327.1 > 1

This paper clip measured to the correct sig figs could be...

• 2.0

• 2.3

• 2.25

• 2

Answer explanation

#s you know for sure plus one estimate

This paper clip measured to the correct sig figs could be...

• 2.3

• 2.4

• 2.33

• 2.40