Which sequence represents the relationship between temperature and volume as explained by the kinetic-molecular theory?

The fact that the total amount of energy in a system remains constant is a(n)

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

How many moles are equal to 2.4×10^23 formula units of sodium chloride