A sample of `NaHCO_(3)(s)` on heating undergoes `1.845 gm` loss of mass. Approximate mass of `NaHCO_(3)` (in nearest integer) in gm is :

Which gas is evolved when NaHCO_(3) is heated ?

Find the mass of Free SO_(3) present in 100gm, 109% oleum sample

An impure sample of As_(2)O_(3) weighitng 20 gm was dissolved in water containing 10 gm of NaHCO_(3) and the final solution was diluted to 400ml . 20ml of this solution was oxidised by 25ml of a solution of l_(2) . Another solution of hypo containing 1.24 gm of Na_(2)S_(2)O_(3).5H_(2)O in 40ml was used to exactly reduce 25 ml of same l_(2) solution (impurities inert) calculate % fo AS_(2)O_(3) in the sample (at. wt. of As=75 )

19 g of a mixture containing NaHCO_(3) and Na_(2)CO_(3) on complete heating liberated 1, 12 L of CO_(2) at STP. The weight (in g) of Na_(2)CO_(3) in the mixture before heating ?