In a reaction, 8.3 g of sodium carbonate reacted with 7g ethanoic acid. The products were 5.2 g of carbon dioxide, 0.9 g water and 5.2 g of sodium etnanoate. Show that these observations are in agreement with the law ot conservation of mass.

Dumbledore decides to gives a surprise demonstration. he starts with a hydrate of na2co3 which has a mass of 4.31 g before heating. after he heats it he finds the mass of the anhydrous compound is found to be 3.22 g. he asks everyone in class to determine the integer x in the hydrate: na2co3·xh2o; you should do this also. round your answer to the nearest integ