How many molecules of oxygen are required to react with 174 g of carbon monoxide in the reaction #CO + O_2 -> CO_2#?

1 Answer
anor277
Jun 9, 2016

The stoichiometrically balanced equation is:

#CO(g) +1/2O_2(g) rarr CO_2(g)#

Explanation:

The balanced equation tells us unequivocally that #28*g# of carbon monoxide gas reacts with #16*g# of dioxygen gas to give #44*g# of carbon monoxide. As is the case in ANY chemical reaction, mass is conserved.

So #"moles of "C-=O# #=# #(174*g)/(28*g*mol^-1)# #=# #6.22*mol#.

And thus #3.11*mol# dioxygen gas are required, that is #3.11*molxx6.022xx10^23" molecules mol"^-1# #=# #??" molecules"#

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