Question

How many molecules are in 7.6g of Dinitrogen Monoxide?

Answer 1

Molar mass of N2O = 14×2 + 16×1

Molar mass of N2O = 28 + 16

Molar mass of N2O = 44g/mol

Number of mole of N2O = mass ÷ molar mass

Number of mole of N2O = 7.6 ÷ 44 = 0.17mol

Number of molecules of N2O= number of mole × Avogadro's Number

Number of molecules of N2O = 0.17 × 6.02 × 10²³

Number of molecules of N2O = 1.03× 10²³