What is the heat of reaction when hydrogen and oxygen combine to form water?
2h2(g) + o2(g) → 2h20(1)
(ah: h2o(l) = -285.8 kj/mol)

there are no statements provided but here is why:

sulfur belongs to group 16 because it can be found in nature whether it is in a free or combined state.

hope this

it forms an anion that has a larger radius. anions have a negative charge and are larger than the original atom.

the formula mass of a molecule or a compound is the sum of the atomic weights of the atoms in its empirical formula

(that's what i know about formula mass)