Question

19. A stone has a mass of 390 g and a density of 2. 7 g/cm3.

Cooking oil has a density of 0. 90 g/cm².

Which mass of oil has the same volume as the stone?

A 130 g

B 160 g

C 900 g

D 1200 g

(Show the working)

Answer 1

A

Step-by-step explanation:

First, we can find the volume of the stone:

`v(stone) = (m(stone))/(ρ(stone)) = (390)/(2.7) ≈144.44 \: {cm}^(3)`

`v(oil) = v(stone) = 144.44 \: {cm}^(3)`

`m(oil) = v * ρ(oil) = 144.44 * 0.90≈130 \: g`