"Carbon dioxide emissions associated with a one-night stay in a hotel room are calculated at 28.71 kg of CO2 per room day for an average hotel. If your hotel's 100 rooms are all occupied for 4 days during a college football game, how much CO2 did the guests and hotel release into the atmosphere

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