sabrinamayy sabrinamayy 10-03-2021 Chemistry contestada Magnesium carbonate decomposes on heating to form magnesium oxide and carbon dioxide as shown.MgCO3 -> MgO + CO2How much magnesium carbonate is needed to make 10.0g of magnesium oxide? A. 3.5gB. 10.5gC. 21.0gD. 6.5gplease answer, I have a test right now. PLEASE PLEASE