Answer to Question #154739 in General Chemistry for John

Question

Laughing gas, an anesthetic, has the formula N₂O. What mass of laughing gas occupies a volume of 0.300dm³ at STP?

Answer 1

Molar Volume of every gas at STP = 22.40dm³

Volume of N₂O at STP = 0.300dm³

Therefore,

Mole = Volume/Molar Volume

Mole = 0.30dm³/22.4mol^-1dm³

= 0.01339mol

Mass = mole × molar mass

Molar mass of N₂0 = 28 + 32= 60gmol^-1

Mass = 0.01339mol × 60gmol^-1

= 0.803g