What is the volume V of a sample of 2.50 mol of copper? The atomic mass of coppe

ID: 2002735 • Letter: W

Question

What is the volume V of a sample of 2.50 mol of copper? The atomic mass of copper (Cu) is 63.5 g/mol, and the density of copper is 8.92×103kg/m3.

Express your answer in cubic centimeters to 3 significant figures

V= cm^3

Extra Question if you can answer.

A 100 mL beaker holds 140 g of liquid.

Part A

What is the liquid's density in SI units?

Express your answer to two significant figures and include the appropriate units.

A 100 mL beaker holds 140 g of liquid.

Part A

What is the liquid's density in SI units?

Express your answer to two significant figures and include the appropriate units.

(1) Mass of copper sample M = 2.50 mol * 63.5 g/mol = 158.75 g = 0.15875 kg

Density of copper sample d = 8.92×103 kg/m3

Volume of copper sample V = M/d

V = (0.15875 kg) / (8.92×103 kg/m3)

V = 1.7797 * 10-5 m3

V = 1.7797 * 10-5 * 106 cm3

V = 17.797 cm3

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(2) Volume V = 100 mL = 0.100 L = 0.100 * 10-3 m = 10-4 m

Mass M = 140 g = 0.140 kg

Density d = M/V

d = (0.140 kg) / (10-4 m)

d = 1400 kg/m3

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