CBSE Class 11-science Answered
are there easy ways to calculate the empirical formula and molecular formula of a compound? if asked in NEET to finish in less than a minute?
Asked by pereirajaison43 | 28 Jul, 2020, 09:03: PM
Expert Answer
There is only one method to solve these type of question. Which has several steps.
Let's unserstand these steps to calculate empirical formula by an example.
Question-A compound contains 38.8% of C,16.0% of H and 45.2% of N.What is the formula of the compound?
Solution-
Given:
C =38.8%
H =16.0%
N =45.2%
Element
% Composition
Atomic Mass
Atomic Ratio
Simplest Ratio
C
38.8
12
3.23≈3
1
N
45.2
14
3.21≈3
1
H
16
1
16
5
The empirical formula of the compound is CH3-NH2
If you want to calculate Molecular formula then-
Molecular Formula= n(Empirical Formula)
n=Molecular Mass/Empirical formula Mass
|
Element |
% Composition |
Atomic Mass |
Atomic Ratio |
Simplest Ratio |
|
C |
38.8 |
12 |
3.23≈3 |
1 |
|
N |
45.2 |
14 |
3.21≈3 |
1 |
|
H |
16 |
1 |
16 |
5 |
The empirical formula of the compound is CH3-NH2
If you want to calculate Molecular formula then-
Molecular Formula= n(Empirical Formula)
n=Molecular Mass/Empirical formula Mass
Answered by Ravi | 29 Jul, 2020, 03:18: PM
Concept Videos
-
Basic Concepts of Chemistry
This video explains the concept of mole in terms of mass, volume, number an... -
Basic Concepts of Chemistry
This video explains the concepts molarity, molality and contains numerical ... -
Basic Concepts of Chemistry
This video contains practice questions and numerical problems based on the ...
CBSE 11-science - Chemistry
Asked by manikandanragul1 | 11 Apr, 2024, 09:02: AM
ANSWERED BY EXPERTCBSE 11-science - Chemistry
Asked by nikhithaguguloth14 | 29 Mar, 2024, 08:15: PM
ANSWERED BY EXPERTCBSE 11-science - Chemistry
Asked by sumedhasingh238 | 27 Mar, 2024, 11:04: PM
ANSWERED BY EXPERTCBSE 11-science - Chemistry
Asked by avijotsingh946431 | 22 Feb, 2024, 05:36: PM
ANSWERED BY EXPERTCBSE 11-science - Chemistry
Asked by gurmelsinghray | 21 Feb, 2024, 08:43: AM
ANSWERED BY EXPERTCBSE 11-science - Chemistry
Asked by bablipanwar893 | 01 Jul, 2023, 12:25: PM
ANSWERED BY EXPERTCBSE 11-science - Chemistry
Asked by saijagdale9 | 19 Jun, 2023, 02:34: PM
ANSWERED BY EXPERTCBSE 11-science - Chemistry
Asked by kdimple765 | 17 Jul, 2022, 01:24: PM
ANSWERED BY EXPERTCBSE 11-science - Chemistry
Asked by alfirozislam900 | 03 Jul, 2022, 01:24: PM
ANSWERED BY EXPERTCBSE 11-science - Chemistry
Asked by alfirozislam900 | 03 Jul, 2022, 01:23: PM
ANSWERED BY EXPERT
