How many grams of CO2 does a plant use to make 100.0 g of sugar(C12H22O11)?

Answer 1

well,
moles Sugar=100/molmassSugar=100/342 moles

moles of CO2=12*molesSugar=1200/342
grams CO2=1200/342 * molmassCO2
and you can calulate that.