Question

on igniting a mixture of acetylene and oxygen,200cm3 of co2 is collected at stp. Calculate the volume of acetylene and O2 at stp in original mixture

Answer 1

2CH2H2+5O2--->4Co2+2H2O
Balanced equation
4vol of co2 is produced from 2vol of acetylene
1vol of acetylene will produced from 2/4
So200cm3of co2 will be produced from 200×2/4=100cm3
4vol of co2 is produced from 5vol of o2
1vol of co2 will produced from =5/4
200cm3 ofCo2 will be produced from 200×5/4=250cm3

Answer 2

2CH2H2+5O2--->4Co2+2H2O

Balanced equation

4vol of co2 is produced from 2vol of acetylene

1vol of acetylene will produced from 2/4

So200cm3of co2 will be produced from 200×2/4=100cm3

4vol of co2 is produced from 5vol of o2

1vol of co2 will produced from =5/4

200cm3 ofCo2 will be produced from 200×5/4=250cm3