How many mL of Carbon Dioxide gas at STP are produced from the decomposition of 4.50g of Ferric Carbonate?

Question

This is How I tried to solve it.....

4.50g Fe12(CO3)3* 1 molFe2(CO3)3/291.72g Fe2(CO3)3* 3 mol CO2/1 mol Fe2(CO3)3* 22.4L CO2/1mol CO2* 1000ml of CO2/1 L of CO2 = 1036.57 which is equal to 1040. mL using 3 sig. figures.
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Answer 1

It is correct.

Answer 2

That looks ok to me.