Calcium carbonate decomposes upon heating, producing calcium oxide and carbon dioxide gas. Can anybody help?

Question

a)write a balanced chemical equation for this reaction.

b)how many grams of calcium oxide will remain after 12.25 g of calcium carbonate is completely decomposed?

c)What volume of carbon dioxide gas is produced from this amount of calcium carbonate? The gas is measured at 0.95 atmospheres and 10 degrees C.

I dont get this one can anybody help me?

Answer 1

a) CaCO3 -> CaO + CO2
This is balanced chemical equation

b) n=m
     M
12.25g/100.088g/mol
100.088
=0.12 moles
0.12x100.0888
=6.73g

c)Do same thing n=m
                  M
0.12molesx44.009g/mol
=5.28moles

If any of this makes sense to you, there you have it!
Enjoy, :)