Will the percent composition by mass of cacl2 change if you have a large amount of the sample or only one formula unit of it? why?

percent composition by mass of CaCl₂ will not change if you have a large amount of the sample or only one formula unit of it. this is explained by law of constant proportion. according to law of constant proportion , a compound always contains elements in its composition in a fixed ratio and that does not change according to the amount of sample of compound taken.

"hydrogen bonding is the attraction of h atoms in the water molecule (slight + charge) to o atoms in a neighboring water molecule (slight - charge); it is a weak interatomic force. but it is still strong enough to the water molecules "stick" together."