For the following questions, You must show your equations and calculations to ge

Question

For the following questions, You must show your equations and calculations to get credit!

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?
-------------------------------------------------

The following data was observed in the lab:

Mass Vol

Sample A 100 g 62.7 mL

Sample b 100 g 113.6 mL

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

Density = Mass/ Volume

For Sample A, Density(A)= 100/62.7 = 1.595 g/mL

1mL= 1 cm3

Density(B)= 100/ 113.6 =0.880 g/mL

Now we have both the densities.So check which elements in teh table have these densities.

So, Sample A= Carbon tetrachloride = 1.595 g/mL

Sample B= Benzene = 0.880 g/mL

Density of water = 1 g/cc

Compounds with density less than water will float on water and whihc have density more than water will sink in water.

Benzene has a density less than water so will float and carbon tetrachloride will sink because it has a density more than water.

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