Answer:
mass = 2.91 grams
Explanation:
Base on Avogadro's law, At standard temperature and pressure the molar volume is the same for an ideal gas. Base on this practical principle the molar volume of gases is 22.4 dm³ per mol.
Since the molar mass of 1 mol of helium is 4.002602, this simply means the molar volume which is 22.4 dm³ = 4.002602.
Convert dm³ to liter ,
1 dm³(cubic decimeter) = 1 liter
22.4 dm³ = 22.4 liter
Therefore,
if 22.4 = 4.002602
16. 3 = mass of the helium gas
cross multiply
mass = 16.3 × 4.002602/22.4
mass = 65.2424126/22.4
mass = 2.91260770536 grams
mass = 2.91 grams
