Please help! This one is easy, I just forgot! Multiple choice!

Look at the reaction below: ca(hco3)2 --> caco3 + co2 + h2o first, balance the reaction. once balanced, use dimensional analysis or another method to find out how many moles of carbon dioxide will be produced if we start with 16.5 moles of calcium bicarbonate (calcium hydrogen carbonate). = mol of co2 number needs to be reported to three significant figures.

Nuclear fusion is the source of energy for stars. besides hydrogen, which other element is most likely also common in stars?

What is the empirical formula of c6h18o3? ch3o c2h5o c2h6o c2h5o5