How do we measure how much of a substance we have

21 just playing hshsjsjshsgdhdhdhhd

What do you need with it’s not a question your just stating what it says

The answer to the question: choose the correct statement.  a) when ethane reacts with fluorine gas the product is less stable.b) addition reactions of unsaturated hydrocarbons and halogens requires a high activation energy.  c)the double covalent bond within unsaturated hydrocarbons requires a lot of energy to break.  d)the double covalent bond within unsaturated hydrocarbons can be broken easily.is: a) when ethane reacts with fluorine gas the product is less stable.

Ithink a i think i tried i hope that : )