Two moles of gas A spontaneously convert to 3 moles of gas B in a container at constant temperature and pressure the original was 10.2 L what is the new volume of gas B

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?

An atom of which element reacts with an atom of hydrogen to form a bond with the greatest degree of polarity ?

Is this correct if not can u correct me