﻿   The mass of one litre sample of ozonised oxygen at N.T.P was found to be 1.5 g. when 100mL of this mixture at N.T.P were treated with turpentine oil, the volume was reduced to 90mL Calculated the molecular mass of ozone.  : Kaysons Education

# The Mass Of One litre sample Of ozonised oxygen At N.T.P Was Found To Be 1.5 G. When 100mL Of This Mixture At N.T.P Were Treated With Turpentine Oil, The Volume Was Reduced To 90mL Calculated The Molecular Mass Of Ozone.

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## Question

### Solution

Correct option is

48

As ozone is absorbed by turpentine oil, therefore volume of ozone in 100mL of the mixture

= 100 – 90 = 10mL

As 1 L of the mixture weigh = 1.5 g, therefore, average molar mass of the mixture

Ratio of ozone: oxygen in the mixture = 10 : 90

If m is the molecular mass of ozone, then

Average mol. mass of mixture

= 33.6 (calculated above)

or + 228 = 336

or           m = 48

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