Question

Martina has a sample of an unknown substance. She measures the substance. Its mass is 13.5 grams, and its volume is 5 cm3. Which metal might her sample be made of?
A silver (density = 10.49g/mc3)

B copper (density = 8.96g/mc3)

C iron (density = 7.87g/mc3)

D aluminum (density = 2.7g/mc3)

Answer 1

The answer is D aluminum (density = 2.7g/mc3).

A density (D) of a substance is a quotient of its mass (m) and its volume (V):
D = m/V

It is given:
m = 13.5 g
V = 5 cm³

Therefore:
D = m/V = 13.5/5 = 2.7 g/cm³

Among all choices, only aluminum has density of 2.7 g/cm³.