The balanced equation is :
"C_2H_4+3O_2\\to 2CO_2+2H_2O"
From the above equation we can see that the ratio of stochiometric coefficient of "C_2H_4 \\ to \\ CO_2" is 1:2
which means from 1 moles of "C_2H_4" 2 moles of carbon dioxide will be produced
we are given 45 grams of "C_2H_4" converting them into number of moles
Number of moles = given mass/ molar mass = 45/48=0.9375
moles of carbon dioxide produced will be equal to twice of this
moles of carbon dioxide = 2*0.9375 = 1.875
Converting this into mass of carbon dioxide produced = 1.875*44 = 82.5 grams
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