The combustion of methane (in natural gas) forms carbon dioxide and water: CH 4

Question

The combustion of methane (in natural gas) forms carbon dioxide and water:

CH4 + 2 O2        CO2 + 2 H2O

How many grams of CO2 are formed for every gram of CH4 that combusts?

a. 12.5 b. 6.25 c. 3.125 d. 1.25

The combustion of methane (in natural gas) forms carbon dioxide and water:

CH4 + 2 O2        CO2 + 2 H2O

How many grams of CO2 are formed for every gram of CH4 that combusts?

a. 0.36 b. 1.00 c. 2.75 d. 44


A viscous liquid

A. resists flow. b. has a very high density. c. has a high surface tension. d. boils at low temperatures.

Explanation / Answer

P4 + 5 O2 ---------> 2 P2O5

from the rate equation,

-1/5 d[O2]/dt = 1/2 d[P2O5]/dt

-d[O2]/dt = 5/2 x 1.25

-d[O2]/dt = 3.125

Therefore answer is , option (c).

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