VII(Halogens) have a charge of -1. Problems to be answered in your Report What i

Question

VII(Halogens) have a charge of -1. Problems to be answered in your Report What is the density of nickel if 2.35 cm3 of nickel weighs as much as 20.92 mL of water? (Assume the density of water is 1.00 g/mL) Compute the thickness of a sheet of tin 75.0 cm x 50.0 cm and having a mass of 4125 g. The density of tin is 7.28 g/mL. The density of silver is 10.5 g/mL. You have been buying silver cubes from a man whose reputation is in doubt. Specifically, you would like to know if the cubes are hollow or solid without destroying a cube by cutting it in half. Your cubes measure 20.00 cm on each side and weigh 84.00 kg each. Are the cubes solid silver or do they have hollow centers? 1. 2. 3. 12

Explanation / Answer

1)

volume of nickel = 2.35 cm3

volume of water = 20.92 mL

mass of water = 20.92 x 1 = 20.92 g

density = mass / volume

            = 20.92 / 2.35

            = 8.90 g/cm3

density of nickel = 8.90 g/cm3

2)

density = mass / volume

7.28 = 4125 / volume

volume = 566.6 cm3

volume = l x b x h

566.6 = 75 x 50 x h

h = 0.151

thickness of sheet = 0.151 cm

3)

volume of cube = 20 x 20 x 20 = 8000 cm3

mass = 84000 g

density = 84000 / 8000

density = 10.5 g/cm3

yes , the cubes are solid silver.

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