4FeCr2O7 + 8K2C03 + O2 --> 2Fe2O3 + 8K2CrO4 + 8CO2

Question

a). How many grams of FeCr2O7 are required to produce 44.0 g of CO2

Answer 1

1. You have the balanced equation.
2. Convert 44.0 g CO2 to moles. moles = grams/molar mass.
3. Using the coefficients in the balanced equation, convert moles CO2 to moles FeCr2O7.
4. Now convert moles FeCr2O7 to grams. g = mols x molar mass.