An alloy was obtained from a piece of copper with a volume of 15 cm3 and a piece of zinc with a volume of 10 cm3.

An alloy was obtained from a piece of copper with a volume of 15 cm3 and a piece of zinc with a volume of 10 cm3. What is the mass of 1 cm3 of the alloy if the mass of 1 cm3 of copper is 8.9 g, and the mass of 1 cm3 of zinc is 7.1?

Determine the volume of a piece of the resulting alloy:

15 + 10 = 25 cm3;

Let’s determine the mass of copper in this piece:

15 * 8.9 = 133.5 g.

Let’s determine the mass of zinc in this piece:

10 * 7.1 = 71 g.

Determine the mass of the resulting piece:

133.5 + 71 = 204.5 g.

Let’s determine the mass of 1 cm3 of the alloy:

204.5: 25 = 8.18 = 8.2 g.

Answer: 8.2 grams.