50cm3 of hydrogen are sparked with 20cm3 of...
50cm3 of hydrogen are sparked with 20cm3 of oxygen at 100°C and 1atm . The total volume of the residual gases in
50 cm3
10 cm3
40 cm3
30 cm3
70 cm3
Correct answer is A
The equation of the reaction is:
2H2(g)+O2(g)=2H2O(g)
Before Sparking we have : 50cm3:20cm3
On Sparking, 40cm3:20cm3:40cm3
After Sparking, we have 10cm3:0:40cm3
Hence, the volume of residual gases = (10+40)cm3=50cm3
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