Question- A 1.75 g sample of solid potassium sulfite (K2S03) is placed in a flask containing 19.75 g of hydrochloric acid. The two react, generating gaseous sulfur dioxide, which all escapes drom the flask, and no other gases. After the reaction, the mass of the contents of the flask is 20.79 g. Determine the mass of the So2 produced.
Anyone can tell me how to solve it step by step so that I will be able to understand what is going on?