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How much dioxygen is required for the complete combustion of a #2.5*g# methane gas?

1 Answer

Feb 1, 2017

Under #12*g# of dioxygen gas will be required for complete combustion.

Explanation:

You need (i) a stoichiometrically balanced equation:

#CH_4 + 2O_2 rarr CO_2 +2H_2O#

And (ii), the molar quantity of methane that undergoes combustion:

#(2.50*g)/(16.01*g*mol^-1)=0.156*mol#

Given the stoichiometry, #2xx0.156*molxx32.00*g*mol^-1=??g# dioxygen gas will combust.

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