1.

280ml of sulphur vapour at ntp weigh 3.2g. The molecular formula of the sulphur vapour is?

Answer»

Hii There!!!


Since, Density of a gas = Mass/ VOLUME
=) 3.2gm/280 ml


Molecular mass = molar vol. × density

Since, molar volume at N.T.P = 22.4L =) 22.4×1000ml

So, molecular mass= 22.4 × 1000× 3.2/280 = 256

Now ,Molecular FORMULA = n × Empirical formula

=) n = molecular mass / empirical mass

=) n = 256/32 =8

Hence, molecular formula of sulphur VAPOUR = 8 × S

=) S8





Hope it helps☺️


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