Request a call back

5. An organic compound contains 26.6%of carbon & 2.2% of hydrogen and the rest oxygen to the vapours density of the compound is 45.Calculate its molecular formula ? Name the organic products obtained when bromo ethen heated with dry silver oxide?
Asked by rahmani | 27 Jan, 2011, 12:00: AM Expert Answer
Divide each percent by that element's atomic weight. To get the answers to whole numbers, divide through by the smallest one.

C = 26.6/12 = 2.22                                 2.22/2.2 = 1

H = 2.2/1 = 2.2                             2.2/2.2 = 1

O = 100-(26.6+2.2)= 71.2/ 16 = 4.45     4.45/2.2 = 2.02

So, empirical formula is CHO2

Vapor density = 45
Molecular weight = 2 x vapor density
MW = 2 x 45 = 90

empirical formula is CHO2
weight = 12 + 1+ 32 = 45
since, molecular weight is 90, n= 2
So, molecular formula is C2H2O4

We hope that clarifies your query.
Regards
Team
Topperlearning
Answered by | 28 Jan, 2011, 10:26: AM

## Concept Videos

CBSE 11-science - Chemistry
Asked by shreyasharma94.11dga | 23 Mar, 2022, 11:42: PM ANSWERED BY EXPERT
CBSE 11-science - Chemistry ANSWERED BY EXPERT
CBSE 11-science - Chemistry
Asked by mrassam2711 | 15 Jan, 2021, 11:54: PM ANSWERED BY EXPERT
CBSE 11-science - Chemistry
Which of the following on thermal decomposition yields a basic as well as an acidic oxide Asked by rajpalsingh5892 | 04 Jun, 2020, 08:29: PM ANSWERED BY EXPERT
CBSE 11-science - Chemistry
Asked by navkirank023 | 02 Jun, 2020, 07:39: PM ANSWERED BY EXPERT
CBSE 11-science - Chemistry
Asked by sangmeshvk2909 | 07 May, 2020, 07:07: AM ANSWERED BY EXPERT
CBSE 11-science - Chemistry
Asked by supreetjoshi28 | 04 May, 2020, 11:12: AM ANSWERED BY EXPERT
CBSE 11-science - Chemistry
Asked by bvk6200718 | 18 Apr, 2020, 07:55: PM ANSWERED BY EXPERT
CBSE 11-science - Chemistry
Asked by binalmarakana16 | 10 Apr, 2020, 10:00: PM ANSWERED BY EXPERT
CBSE 11-science - Chemistry
Asked by binalmarakana16 | 10 Apr, 2020, 02:41: PM ANSWERED BY EXPERT