Persamaan gas ideal:
\(P \:.\: V = n \:.\: R \:.\: T\)
P = tekanan gas (dalam satuan atm)
1 atm = 76 cmHg
V = volume gas (dalam satuan liter)
1 liter = 1 dm³
n = jumlah mol gas
R = konstanta = 0,082
T = suhu gas (dalam satuan Kelvin)
Kelvin = Celcius + 273