HA revision: sig figs

Which of the following has the most sig figs?

• 80.00 g

• 0.0800 g

• 800000 g

• 800.00 g

Which has the least sig figs?

• 4.00 mL

• 0.040 L

• 0.400 mL

• 0.0004 L

Which has the most sig figs?

• 0.63000 m

• 63.2 m

• 6.320 m

• 6320000 m

Which has the least sig figs?

• 0.63000 m

• 63.2 m

• 6.320 m

• 6320000 m

63.2 cm x 0.65 cm = _____ cm.

Your must have the right number of sig figs!

0.0651 kg ÷ 4.2 L = _____ kg/L.

You must put the right number of sig figs!

The mass of your 10.00 cm3 sample of gold is 192.61 g. What is your experimental value for density of gold (to an appropriate number of sig figs)?

______ g/cm3

You obtained the experimental value of 19.26 g/cm3 for the density of gold. The accepted value is 19.3 g/cm3. What is the percentage error in your measurement, to an appropriate number of sig figs?

_____ %

When giving the answer from a calculation...

• the number of sig figs should be 3

• the number of sig figs should be the same as the most sig figs in the data you used

• the number of sig figs should be the same as the least sig figs in the data you used

• the number of sig figs should be as many as you like

How many sig figs in 39200?

• 5

• 4

• 3

• 2

• 1