Q16. Calculate the number of moles and molecules of ammonia (NH3) gas in a
volume 67.2 dm3 of it measured at STP.(3)
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Answer:
Explanation:
NH3=67.2dm^3
No. Of moles = 67.2 ÷ molar volume
of gas
=67.2÷22.4
=3.0 mol
No. of = 3.0 × avocadro's constant
molecule. = 3.0 × 6.022 × 10^23
= 18.066 × 10^23 molecules
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