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P1 = 16 kPa
Mr = 2
Oksigen
P2 = __ ?
Mr = 32
PV = nRT
dengan n = m/Mr
Jadi
PV = m/Mr RT
Bandingkan
P1 V1.....m/Mr1 RT
---------- = -----------coret V, T, m
karena sama
P2 V2.....m/Mr2 RT
P1.....Mr2
----- = ------
P2.....Mr1
16.....32
----- = -----
P2.....2
P2 = 1 kPa.
2][
mungkin nilai Ek = 6x10^-21 J
V = 100 cm^3 = 10^-4 m^3
P = 200 kPa = 2x10^5 Pa
PV = Nkt
Ek = 3/2 kT
bandingkan
PV......Nkt
----- = ------..coret kT
Ek......3/2 kT
N = 3/2 PV/Ek
...= 3/2 (2x10^5)(10^-4)/(6x10^-21)
...= 5x10^21