Propane burns in air according to the following equation: {\C}_3 {\H}_8+5 {\O}_2 \to 3 {\CO}_2+4 {\H}_2 {\O} What volume of propane is consumed on using 1000 {\cm}^3 of air, considering only 20 \% of air contains oxygen?

ICSE Class 10 Chemistry 2017 Solved Paper - Question 60

Question : 60 of 86

Marks: +1, -0

Propane burns in air according to the following equation:

{\C}_3 {\H}_8+5 {\O}_2 → 3 {\CO}_2+4 {\H}_2 {\O}

What volume of propane is consumed on using

1000 {\cm}^3

of air, considering only

20 \%

of air contains oxygen?

Solution:

\table {\C}_3 {\H}_8,+,5 {\O}_2 ,→ ,3 {\CO}_2,+,4 {\H}_2 {\O};1,:,5,::,3

20 \%

of oxygen in

1000 {\cm}^3

of air

=200 {\cm}^3

.

5 vol. Oxygen uses for 1 vol

{\C}_3 {\H}_8

.

200 vol. Oxygen uses for

\;{1}/{5} × 200

=40 {\cm}^3

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