**Density Homework**

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All answers are to be in decimal form (not scientific notation). All answers need to be rounded to the correct number of significant digits.

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1. A rock with a
density of 4.56 g/mL and a mass of 3.45 g has what volume? **(0.757 mL)**

2. A rock with a
mass of 4.59 g and a volume of 5.78mL has what density? **(0.794 g/mL)**

3. A rock with a
volume of 10.0 mL and a density of 3.87 g/mL has what mass? **(38.7 g)**

4. A marble with a
density of 8.93 g/mL and a mass of 9.00 g has what volume? **(1.01 mL)**

5. A marble with a
volume of 80.9 mL and a density of 1.90 g/mL has what mass? **(154 g)**

6. A boat with a
mass of 9.04 x 10^{5} Kg and a volume of 8.90 x 10^{7} mL has
what density (notice that you will have to convert Kg into grams before beginning
this problem). **(10.2 g/mL)**

7. A styrofoam ball
with a density of 1.05 g/L and a volume of 5.90 mL will have what mass? (notice that you will have to convert g/L
into g/mL before beginning this problem). **(0.00620
g – that’s 3 sig figs)**

8. A computer
monitor with a density of 89.0 Kg/mL and a volume of 5.00 L will have what
mass? (notice that Kg/mL will have to
be converted to g/mL and volume will need to be converted to mL before
beginning this problem.) **(445,000,000 g or 4.45 x 10 ^{8}g)**

9. A stapler with a mass of 3.48 Kg and a density of 9.00 g/L will have what volume?

**(387,000 mL or 3.87 x
10 ^{5}mL)**

10. A watch with a
mass of 0.09 Kg and a volume of 18.0 mL will have what Density? **(5 g/mL)**

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REMEMBER:

1 L = 1 dm^{3}

1 L = 1000 mL

1mL = 1 cm^{3}