Magnesium carbonate decomposes on heating to form magnesium oxide and carbon dioxide as shown.
MgCO3 -> MgO + CO2
How much magnesium carbonate is needed to make 10.0g of magnesium oxide?
A. 3.5g
B. 10.5g
C. 21.0g
D. 6.5g
please answer, I have a test right now. PLEASE PLEASE