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Average distance between molecules of water vapour at 100 °C and 1 atm is about
A4 Å
B400 Å
C2 Å
D40 Å
Answer & Solution
Correct answer: D. 40 Å
Vapour volume is about 10^3 times the liquid's, so spacing grows tenfold from about 4 Å to about 40 Å.
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