My answers are in bold.

To how many significant figures is each quantity expressed?

a. 4.5609 =

**5**

b. .10 =

**2**

c. 12.3x10 to the -3 power =

**3**

d. 5310 =

**4**

e. .0231 =

**3**

f. 6.1240 x 10 to the 6th power =

**4**

g. 23642000 =

**5**

h. .0041962 =

**4**

Use the definition density = mass/volume to calculate the density of a liquid with a volume of 50.6 mL if that liquid is placed in an empty beaker with a mass of 32.344 g and the mass of the liquid plus the beaker is 84.64g.

**2.646 g/mL**

Calculate the mass of 17.0 mL of aluminum, which has a density of 2.72 g/mL.

**46**

Calculate the volume occupied by 15.4 grams of nickel, which has a density of 8.91 g/mL.

**1.73**

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