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If the percentage yield for the combustion reaction of methane is 92%.What mass of CO2...

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persianimmortal | Student, Grade 12 | Valedictorian

Posted April 18, 2013 at 10:37 PM via iOS

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If the percentage yield for the combustion reaction of methane is 92%.What mass of CO2 is produced by burning 75.0 grams of methane in excess oxygen?

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jeew-m | College Teacher | (Level 1) Educator Emeritus

Posted April 19, 2013 at 3:47 AM (Answer #1)

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`CH_4+2O_2 rarr CO_2+2H_2O`

 

Molar mass

`CH_4 = 16g/(mol)`

`CO_2 = 44g/(mol)`

 

Amount of `CH_4` burned

`= 75g`

`= 75/16 mol`

`= 4.6875 mol`

 

Mole ratio

`CH_4:CO_2 = 1:1`

 

Theretical amount of `CO_2 ` produced

`= 92/100xx4.6875`

`= 4.3125 mol`

 

Amount of `CO_2` yield

`= 4.3125xx44 g`

`= 189.75g`

 

So the `CO_2` yield is 189.75g.

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