Problem: A box contains a mixture of small copper spheres and small lead spheres. The total volume of both metals is measured by the displacement of water to be 426 cm3 and the total mass is 4.31 kg .What percentage of the spheres are copper?

FREE Expert Solution

We are being asked to calculate the percentage of copper spheres in the mixture.


We are given: total mass = 4.31 kg and total volume = 426 cm3

This mean:

massCu + massPb = 4.31 kg

VolumeCu + VolumePb = 426 cm3

We can relate mass and volume using density.


Recall: Density represents the mass of an object or compound within a given volume

Density(d) = mass (m)Volume (V)

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Problem Details

A box contains a mixture of small copper spheres and small lead spheres. The total volume of both metals is measured by the displacement of water to be 426 cm3 and the total mass is 4.31 kg .

What percentage of the spheres are copper?

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Density concept. You can view video lessons to learn Density. Or if you need more Density practice, you can also practice Density practice problems.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Castaneda's class at UMICH.