PLEASE HELP I HAVE 30 minutes to finish the test also correct me if i’m wrong pls no links or fake answers

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.

When would a bouncy ball have the most potential energy

Ab c or d ? i’m not sure what the answer is