Question

10g of Copper reacts with 5g of Sulfur

How much Sulfur is needed to react with 20g of Copper?

​

Answer 1

10g of Sulfur reacted with 20g of Cu

Explanation:

10g of Cu = 5g of Sulfur

20g of Cu = x Sulfur

You can cross multiply or just flip the grams on the left to

20g ÷ 10g × 5

=20/10 = 2

2× 5 = 10g