Question

A solution of ammonia and water contains 3.80•10^25 molecules of water and 5.50•10^24 molecules of ammonia. How many hydrogen atoms are in this solution?

1 molecule of water=1 oxygen and 2 hydrogen
1 molecule of ammonia= 1 nitrogen and 3 hydrogen

Please show work

Answer 1

N H in H2O = 3.80×10²⁵ ×
`(2H)/(1H2O)` = 7.60×10²⁵atoms of H

N H in NH3 = 5.50×10²⁴×
`(3H)/(1NH3)` = 1.65×10²⁵atoms of H

1.65×10²⁵+7.60×10²⁵= 9.25×10²⁵atoms of H