Calculate the number of moles in the follwing 1 ) 128 g of oxygen 2)68g of ammonia
Answers
1) given mass of O2 =128 g molar mass of O2 = 16 g
so, the no. of moles = given mass/ molar mass =128/16 =8 moles
2) given mass of NH3 = 68 g molar mass of NH3 =14 + 1 x 3 = 17 so, no. of moles = 68/ 17 = 4 moles