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Methane and oxygen react together to for...

Methane and oxygen react together to form carbon dioxide and water.
`16g CH_4 + (x)g O_2 rarr 44g CO_2 + 36g H_2O`
a) Find out the calue of x.
b) State the law which is used to complete the equation.

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a) x = 64g
b) law of conservation of mass
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