Density Homework

 

 

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

 

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 105 Kg and a volume of 8.90 x 107 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 108g)

 

 

 

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 105mL)

 

 

 

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

 

 

 

REMEMBER:

1 L = 1 dm3

1 L = 1000 mL

1mL = 1 cm3