Question

12. Calculate the number of calcium ions in 5.6 g of
calcium oxide. (Ca = 40)
13. What is the percentage composition of the
elements in ammonia, NH3? (N = 14, H = 1 )
14. 2.0 g of a sample of sodium chloride contains
0.785 g of sodium and 1.775 g of chlorine. In
another sample, 2.925 g of sodium chloride
ng​

Answer 1

Answer:

12.1 mole or 6.022×10^23 ion of calcium