A sample of pure calcium fluoride with a mass of 15.0 g contains 7.70 g of calcium.How much calcium is contained in 30.0 g of calcium fluoride?
A) 1.71 g
B) 7.70 g
C) 15.0 g
D) 15.4 g

Question

Quizplus · Accepted Answer

Using the given information, we can set up a proportion:

mass of calcium / mass of calcium fluoride = mass of calcium / 30.0 g

7.70 g / 15.0 g = x g / 30.0 g

Solving for x:

x = 15.4 g

Therefore, 30.0 g of calcium fluoride contains 15.4 g of calcium.

Therefore, the correct choice is D.

A Sample of Pure Calcium Fluoride with a Mass of 15.0