The following data was observed in the lab: Mass Vol Sample A 100 g 62.7 mL Samp

Question

The following data was observed in the lab:

Mass Vol

Sample A 100 g 62.7 mL

Sample b 100 g 113.6 mL

substance density/ g cm^-3
--------------------------------------------------
helium gas 0.000 16
dry air 0.001 185
gasoline 0.66 ---> 0.69 v
kerosene 0.82
benene 0.880
water 1.000
carbon tetrachloride 1.595
magnesium 1.74
salt 2.16
aluminum 2.70
iron 7.87
copper 8.96
silver 10.5
lead 11.34
uranium 19.05
gold 19.32 B?
-------------------------------------------------

A. Based on the data table of densities to the right, what most likely is Sample A? What most likely is Sample B? Show your calculations!

B. Will Sample A float in water? Why?

C. Will Sample B float in water? Why.

Explanation / Answer

A. 1 ml = 1 cc.

Density of sample A is 100/62.7 = 1.59 g/cc.

Density of sample B is 100/113.6 = 0.88 g/cc.

Based on the data tables sample A is carbon tetrachloride and Sample B is benzene.

B. Sample A is denser than water (1 g/cc). It will not float in water.

C. Sample B is less dense. It will float.

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