KVPY SX SB Exam 20141 Question Paper

Question : 102 of 120

Marks: +1, -0

The density of acetic acid vapor at 300 K and 1 atm is 5 mg cm

^{-3}

. The number of acetic acid molecules in the cluster that is formed in the gas phase is closest to

Solution:

PM = ρRT

M=({5×0.0821×300}/1)=123.15

∴ Number of acetic acid molecule

=123.15/60 ≈ 2

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