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Water vapour at 100 °C and 1 atm has density 0.6 kg/m³. Fraction of volume filled by molecules?
A6 × 10^-2
B0.6
C6 × 10^-7
D6 × 10^-4
Answer & Solution
Correct answer: D. 6 × 10^-4
Molecules pack at about 1000 kg/m³, so the filled fraction is 0.6/1000 = 6 × 10^-4.
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