Home
Class 11
CHEMISTRY
A compound containing carbon, hydrogen a...

A compound containing carbon, hydrogen and oxygen gave the following analytical data C= 40.0%, H= 6.67%. Calculate the molecular formula of the compound, If its molecular mass is 180.

Text Solution

Verified by Experts

We are given that
(i) Percentae of carbon = 40.0%
Percentage of hydrogen = 6.67%
(ii) Molecular mass of compound = 180
We are to find out the following
(a) Percentage of oxygen = ?
(b) Empirical formula mass= ?
( c) Value of n= ?
(d) Molecular formula of compound= ?
Calculations
(i) Calculation of percentage of oxygen `=100- (% " of " C + % " of" H)`
`=100- (40.0 + 6.67) = 53.5%`
(ii) Calculate of empirical formula mass of the compound

Empirical formula of the compound `=C_(1)H_(2)O_(1)= CH_(2)O`
`therefore` Empirical formula mass of the compound `=12+2 +16=30`
(iii) Calculation of value of `n= ("Molecular formula mass")/("Empirical formula mass")= (180)/(30)=6`
(iv) Molecular formula of compound `=n xx` empirical formula `=6 xx (C_(1)H_(2)O_(1))1= C_(6)H_(12)O_(6)`. Thus, molecular formula of the compound is `C_(6)H_(12)O_(6)`.
Promotional Banner

Topper's Solved these Questions

  • SOME BASIC CONCEPTS OF CHEMISTRY

    OMEGA PUBLICATION|Exercise Multiple Choice Questions (MCQs)|29 Videos

  • SAMPLE QUESTION PAPER -v (PUNJAB)

    OMEGA PUBLICATION|Exercise QUESTION|45 Videos

  • STATES OF MATTER

    OMEGA PUBLICATION|Exercise Multiple Choice Questions (MCQs) |29 Videos

Similar Questions

Explore conceptually related problems

Calculate the molecular mass of the compound if its vapour density is 54.4.

Write the empirical formula of the compounds having the molecular formulas : C10H8

Write the empirical formula of the compounds having the molecular formulas : C6H6

Write the empirical formula of the compounds having the molecular formulas : B2H6

Write the empirical formula of the compounds having the molecular formulas : C6H12O6

Write the empirical formula of the compounds having the molecular formulas : C12H22O11

An organic substance containing carbon, hydrogen and oxygen gave following percentages, C= 40.68%, H_(2) = 5.085% and O_(2) = 54.22%. The vapour density of the compound is 59. Calculate the molecular formula of the compound.

The empirical formula of the compound is CH3. Calculate the molecular formula if molecular mass is 30.

An organic compound has the following percentage composition : C= 48%, H= 8% N= 28% and rest of oxygen. Calculate the empirical formula of the compound.