Chemistry(chemical reaction)?

Aqueous mercury (II) nitrate is treated with hydrogen sulfide, forming a precipitate and a solution. Write the molecular and net ionic equation for the reaction. An acid is formed, (ume the reaction will take place) is it a weak or strong acid? Name each of the products formed. If 65.65g of mercury (II) nitrate and 4.26g of hydrogen sulfide are mixed in 490.0g of water to form 54.16g of precipitate, what is the m of the solution after reaction?