of 0.250 M hydrochloric acid solution?

Hi Tutor, can you please help me with question 13 please? This is under the topic of Acid and Bases.

of 0.250 M hydrochloric acid solution?1.00 gram of hydrated barium hydroxide [Ba(OH)2.yH20] required 63.4 mL of0.100 M nitric acid solution for complete neutralisation. Evaluate the integer "y".What mass of solid anhydrous sodium carbonate will react completely with 20.0 mL1.31 grams of solid hydrated potassium carbonate [K2CO3.yH20] reacted completely