Dinitrogen monoxide,or laughing gas (N₂O),is used as a dental anesthetic and as an aerosol propellant.How many molecules of N₂O are present in a 12.6 g sample of the compound?

Question

Quizplus · Accepted Answer

The molar mass of N2O is 44.01 g/mol. So, 12.6 g of N2O is equal to 12.6 g / 44.01 g/mol = 0.286 mol. 1 mol of any substance contains 6.022 × 10^23 molecules. So, 0.286 mol of N2O contains 0.286 mol * 6.022 × 10^23 molecules/mol = 1.72 × 10^23 molecules.

Dinitrogen Monoxide,or Laughing Gas (N2O),is Used as a Dental Anesthetic

Dinitrogen Monoxide,or Laughing Gas (N₂O),is Used as a Dental Anesthetic