NEET Class neet Answered
A compound of carbon, hydrogen and nitrogen contains elements in ratio 9:1:3.5. Its molecular mass is 108. What is the molecular formula?
Asked by abhishekverma0300 | 24 Jun, 2020, 06:32: AM
Expert Answer
|
Element |
Mass ratio |
Atomic mass |
Relative Number of atoms |
Simplest ratio |
|
C |
9 |
12 |
9/12 = 0.75 |
0.75X4=3 |
|
H |
1 |
1 |
1/1=1 |
1X4=4 |
|
N |
3.5 |
3.5 |
3.5/14=0.25 |
0.25X4=1 |
Empirical ratio = C3H4N
Empirical formula mass = (3x12)+(4x1)+14= 54
n= Molecular mass = 108 = 2
Empirical formula mass 54
Molecular formula = (empirical formula)2 = (C3H4N)2 = C6H8N2
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