How many moles of molecular oxygen will be needed for the complete combustion of 100.0 g of sulfur dioxide? The product of this reaction is sulfur trioxide.

Question

Quizplus · Accepted Answer

The balanced chemical equation for the combustion of sulfur dioxide is:SO2 + 1/2 O2 -> SO3From the equation, we can see that 1 mole of SO2 requires 1/2 mole of O2 for complete combustion.Given mass of SO2 = 100.0 gMolar mass of SO2 = 64.07 g/molNumber of moles of SO2 = 100.0 g / 64.07 g/mol = 1.561 molesTherefore, the number of moles of O2 required for complete combustion of 100.0 g of SO2 is:1.561 moles SO2 x 1/2 mole O2 / 1 mole SO2 = 0.7804 moles O2Hence, the correct choice is A) 0.7804 moles.

How Many Moles of Molecular Oxygen Will Be Needed for the Complete