Which compound has the greatest percent composition by mass of sulfur

What is the mass of sodium in 3 moles of sodium chloride

Solutions of sodium carbonate and silver nitrate react to form solid silver carbonate and a solution of sodium nitrate. a solution containing 3.50 g of sodium carbonate is mixed with one containing 5.00 g of silver nitrate. how many grams of sodium carbonate, silver nitrate, silver carbonate, and sodium nitrate are present after the reaction is complete?

Is 9 correct? and can someone me with 10? it’s due tomorrow, you