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asked ago in Chemistry by (18.8k points)

How many molecules are present in one ml of water vapours at STP -

(1) 1.69 × 1019 

(2) 2.69 × 10–19

(3) 1.69 × 10–19 

(4) 2.69 × 1019

Sarthaks Test For Class 7-12

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answered ago by (20.1k points)
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Best answer

Correct Answer is: (4) 2.69 × 1019 

∵ 22.4 litre water vapour at STP has = 6.023 × 1023 molecules

∴ 1 × 10–3 litre water vapours at STP has

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