Silicon dioxide, made up of elements silicon and oxygen, contains 46.7% by mass of silicon. With what mass of oxygen will 10 g of silicon combine?

 

Solution:

Concept: 100g of silicon dioxide contains 46.7 g of silicon or  100 – 46.7 ( i.e. 53.3 g) of oxygen.

It means 10g of silicon will contain oxygen.

Hence 10 g of silicon combined with 5.33 g of oxygen.