For the following reaction, 14.8 grams of sulfur are allowed to react with with 19.9 grams of carbon monoxide.
sulfur (s) + carbon monoxide (g) sulfur dioxide (g) + carbon (s)
What is the maximum amount of sulfur dioxide that can be formed?
S + 2CO = SO2 + 2C
First, look for the amount of substance of sulfur: n(S) = m / M n(S) = 14.8 g/32 g / mol = 0.4625 mol n(CO) = m (CO) / M (CO) M(CO) = 12 + 16 = 28 g/mol n(CO) = 19.9 g/28 g/mol = 0.71 mol S in excess, so for calculating we take CO: n(SO2) = n(CO)/2 = 0.71 mol/2 = 0.355 mol m(SO2) = M(SO2)*n(SO2) M(SO2) = 32 + 16*2 = 64 g/mol m(SO2) = 64 g/mol * 0.355 mol = 22.74 g
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