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gas N2
T = 25°C
P = 1 atm
V = 11,2 L
ditanya:
m N2 = ...?
P = 1 atm dan T = 25°C , berarti Keadaan itu dalam Keadaan Standar (STP)
n = V / 22,4 L
= 11,2 L / 22,4 L
= 0,5 mol
Mr N2 = 2(14) = 28
massa = n × Ar
= 0,5 × 28
= 14 gram