Answer:
1. 22 moles of FeCr2O7
2. 53.95 moles of O2
3. 77.25 moles of O2
Explanation:
4 FeCr2O7+ 8 K2CO3 + 1 O2-----------> 2 Fe2O3+ 8 K2CrO4 + 8 CO2
1. How many moles of FeCr2O7 are required to produce 44 moles of CO2?
Equate the moles of the compounds in the question
4 moles of FeCr2O7 produces 8 moles of CO2
(44 *4 / 8) moles of FeCr2O7 will produce 44 moles of CO2
= 44 *4 / 8
= 22 moles
2. How many moles of 02 is required to produce 107.9 moles of Fe2O3?
1 mole of O2 = 2 moles of Fe2O3
(107.9 *1 / 2) moles of O2 will be required to produce 107.9 moles of Fe2O3
= 107.9 * 1 / 2
= 53.95 moles
3. The ratio of moles for FeCr2O7 to O2 in the reaction is
4 : 1
309 : x ; solve for x
x = 309 * 1 / 4
x =77.25 moles of O2
