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CH4 + 2 O2 --> CO2 + 2 H2O

x / 64 = 1 / 16

x = 4 g oxygen

Assuming oxygen is 20% oxygen...

4 = .2 x

x = 20 g air that is one possible answer.

A better answer--- air is 20% oxygen by volume and 80% nitrogen by volume.

1g methane / 16 = 0.0625 mole

0.0625 / 1mole meth = x / 2mole oxy

x = 0.125 mole oxygen =20% of air

--- 0.625 mole 'air'

0.2 x 32 + 0.8 x 28 = 28.8 g/mole of air

0.625 x 28.8 = 18 grams of air

Since air is 20% oxygen by volume, the 2nd answer is best.

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How many molecules of oxygen are needed for the incomplete combustion of one molecule of methane?

For the incomplete combustion of one molecule of methane (CH4) to form carbon monoxide (CO) rather than carbon dioxide (CO2), one molecule of oxygen (O2) is needed. This results in the equation: CH4 + O2 -> CO + H2O.


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What mass of water is produced from the complete combustion of 2.50x10-3 of methane?

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