How many molecules are present in 78.9 g of silver nitrate (AGNO3)?

In any atom of any element, you will find protons and neutrons in the nucleus of any atom 

Is there any options, for this

Answer earth,water,fire and air;

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.