a fixed volume of a gas is 760cm² at 27°C and 70 cm of Mercury what is the volume at s.t.p
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Explanation:PV=nRT
n1 = P1V1/R1T1
n2=
n1 = n2
P1V1/R1T1 = P2V2/R2T2
R1 = R2
P1V1/T1 = P2V2/T2
V2 = P1V1T2/(T1P2) = 70 cm Hg x 760 cm3 x 273 K/(300 K x 76 cm Hg) = 637 cm3
You can use the combined gas law to get the same formula.
V1/V2 = P2/P1 x T1/T2
V2 = V1P1T2/(P2T1)
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