In a combustion reaction, initially there were #77.8*g# of oxygen gas, and a #22.8*g# mass of carbon; #18.0*g# of oxygen remained after the reaction. If the carbon were completely oxidized, what mass of carbon dioxide resulted?

1 Answer
anor277
May 24, 2017

Look at the conditions proposed by the reaction........

Explanation:

#77.8*g-18.0*g# oxygen gas reacted, and #22.8*g# carbon was consumed. Given complete combustion, CLEARLY, #(59.8+22.8)*g=82.6*g# #CO_2(g)# were produced.

Why #"CLEARLY?"#. Because mass is conserved in all chemical reactions. #"Garbage in must equal garbage out".# See this link.

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