Question

4NH3 + 5O2 → 4NO + 6H2O MM NH3 = 17.04 g/mol; MM O2 = 32 g/mol; MM NO = 30.01 g/mol; MM H2O = 18.02 g/mol How many moles are in 35 g of NO? 4.8 mol 1.2 mol 1100 mol 0.85 mol

Answer 1

1.2 mol.

Step-by-step explanation:

• We can calculate the number of moles of a substance using the relation:

n = mass / molar mass

n is the number of moles.

m is the mass in g (m of NO = 35.0 g)

Molar mass NO = 30.01 g/mol.

• n = mass / molar mass = (35.0 g) / (30.01 g/mol) = 1.166 mol ≅ 1.2 mol.