Question

How many grams of ethane gas (C2H6) are in a 12.7 liter sample at 1.6 atmospheres and 24°C?

Answer 1

\[\rm pressure \times volume = number ~of ~moles \times gas~constant ~\times temperature~in~Kelvin \]

Answer 2

convert atm to Pa
and volume to m3
temperature to Kelvin

Answer 3

^ you'll be able to see that clearly if you know the gas constant.