A compound of sodium does not give CO_(2) when heated but it gives CO_(2) when treated with dilute acids. A crystalline compound is found to have 37.1 percent Na and 1.6 percent Ho_(2). Hence the compound is

A compound of sodium does not give CO_(2) when heated but it gives CO_

1.	A compound of sodium does not give CO_(2) when heated but it gives CO_(2) when treated with dilute acids. A crystalline compound is found to have 37.1 percent Na and 1.6 percent Ho_(2). Hence the compound is
Answer» `NaHCO_(3), 10H_(2)O` `NaHCO_(3).5H_(2)O` `Na_(2)CO_(3).10H_(2)O` `Na_(2)CO_(3). H_(2)O` Solution :`Na_(2)CO_(3)xxH_(2)O` `4600=3932.6 +667.8x` `667.4=667.8x,x=1`