Question

When a certain amount of octane, C8H18, is burnt completely, 7.04 gm Co, is formed. What is the
weight of H2O formed, simultaneously?
(A) 1.62 gm
(B) 6.48 gm
(C) 3.24 gm
(D) 2.28 gm

just tell the answer.​

Answer 1

Answer:

3.24 is your answer

Explanation:

C8H17 + O2 ---------------> CO2 + H20

THEREFORE BALANCING THE EQUATION, WE

GET

C8H17 + 25/2O2 ---------------> 8CO2 + 9H20

Weight of CO2 = 7.04gm

Therefore,

nCO2/8 = nH20/9

7.04/44/8 = x/18/9

Solve for x,

x = 3.24 gms.