Quiz: Density Determination

1. If 1 cubic ft water weighs 62.4 lbs, how much would 5.6 cubic ft of water weigh?

d (water)=62.4/1 lbs/ft

d=m/v or m=d.v

M=62.4*5.6=349 lbs

2. A metal sample was placed in a graduated cylinder of deionized water and the volume in the cylinder increased from 45.6 ml to 46.8 ml. How much water was displaced by the metal?a. none, the water volume just increased when the metal was added.b. 92.4 ml of waterc. 46.8 mld. 1.2 ml

d. 1.2 ml

3. If the sample of metal in the above question had a mass of 8.697 grams, what is the density of the metal (to the correct number of significant figures)?a. 7.2 g/mlb. 7.248 g/mlc.0.13 g/mld. 0.1380 g/mle. 0.19 g/mlf. 0.1858 g/ml

a. 7.2 g/ml

4. 2. According to its owner, a chain necklace is made of pure gold (d=19.2g/mL). In order to check this, the chain is weighed to find a mass of 19.21g. The chain was then put into a graduated cylinder that contained 20.8mL of water, and the water level rose to 22.0 mL. (1) Find the density of the necklace in g/mL). (2) Is it made of pure gold?      A(16, Yes),  B(16, No),  C(19, Yes), D(19, No), E(21, No)]

B(16, No)