Question

What is the volume V of a sample of 4.00 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.

Answer 1

28.5cm³

Explanation:

Given parameters:

Number of moles of copper = 4 mole

Atomic mass of Cu = 63.5g/mol

Density of copper = 8.92 x 10³kg/m³ = 8.92g/cm³

Unknown:

Volume of the sample of copper = ?

Solution:

From the given parameters, first find the mass of the copper using the product of the number of moles and molar mass. Then, use the density equation to find volume from the obtained mass.

Solving:

   Mass of copper = Number of moles x molar mass of copper

                              = 4 x 63.5

                              = 254g

 Density = $\frac{mass }{volume}$

Volume = $\frac{mass}{density}$ = $\frac{254}{8.92}$ =    28.5cm³

Volume of the copper is 28.5cm³

Learn more:

Density brainly.com/question/1747765

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