Question

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?

Answer 1

15.40 g

Step-by-step explanation:

15.0 g of calcium fluoride contains 7.70 g of calcium

30.0 g of calcium fluoride contains (30.0 x 7.70)/15.0 = 15.40 g