Some Basic Concepts of Chemistry Part 2

CxHy+(x+‌

y

4

)O2→xCO2+‌

y

2

H2O
From the reaction,
Produced CO2=x‌mol
and produced H2O=‌

y

2

‌mol
Given produced CO2=330g
∴ moles of CO2=‌

330

44

=‌

30

4

=x
Also given produced H2O=270‌gm
∴ Moles of H2O=‌

270

18

=15=‌

y

2

.
⇒y=30
∴x:y=‌

30

4

:30=1:4
Formula of the compound =(CH4)n
∴ Weight of C in (CH4)n=12n
Weight of H in (CH4)n=4n
∴ Weight ratio of C and H
=12n:4n
=3:1
∴% of C=‌

3

4

×100=75
and % of H=‌

1

4

×100=25