9 Matching Annotations
  1. Sep 2017
    1. CaCO3(s) -->   CaCO(s) + CO2(g)  As the name implies, something decomposes into something else.  Here Calcium Carbonate decomposes to calcium oxide and carbon dioxide

      I do not think this is balanced correctly.

    2. In a combustion reaction a compound reacts with oxygen and releases energy.

      in a combustion equation is it correct to say the compound that will combust will always contain carbon and hydrogen and oxygen?

    1. (aq) - aqueous

      I understand that 'aqueous' means in water, and I know that you don't just add it to an equation. It is a phase. But I would like to know why it is not added to the equation? How come NaCl(aq) is not NaClH20.