How to calculate the number of moles produced

Starting with 3.02 mol of CO, calculate the number of moles of CO2 produced if there is enough O2 to react with all of the CO.
2CO+O2 ---> 2CO2

take your moles of CO, multiply it by the molar ratio between what you have and what you're looking for

(3.02 mol CO) • ((2 mol CO2) / (2 mol CO)) = 3.02 moles of CO2

it doesn't matter numerically in this problem, but when using molar ratios, make sure that your units divide out (in this problem, mol CO divides out of the numerator and denominator leaving you with mol CO2 in the numerator) if the ratio is flipped, your answer could be wrong, so watch out for that.

oh, and the molar ratio comes from the balanced equation

and Jay, the answer is supposed to be in moles, not grams

Since you're given the amount of moles, you can go straight to the mole to mole conversion.

For every 2 moles of CO, there are 2 moles of CO2 produced.

3.02 mol CO (2 mol CO2 / 2 mol CO) (44 g CO2 / 1 mol CO2) = 132.88 g CO2

The correct answer should be 133 g CO2 :)