Why are a molecule's atoms as far away from each other as they can get? A. Forces between electron pairs push the atoms apart.
B. Induced dipoles push the atoms away from each other.
C. Electronegativity differences force the atoms apart.
D. The protons in the nuclei push the atoms apart.

A

Explanation:

Because I just answered it and it’s right. ( Forces between electron pairs push the atoms apart.

1. for the first question, we must find the mass of the anhydrous salt, mgso₄. the molar mass for mgso₄·7h₂o is 246.47 g/mol, while that of mgso₄ is 120.37 g/mol.7.834 g mgso₄·7h₂o * 1 mol mgso₄·7h₂o/246.47 g * 1 mol mgso₄/1 mol mgso₄·7h₂o * 20.37 g mgso₄/mol = 0.647 g mgso₄

2. mass of water = mass of sample - mass of anhydrous salemass of water = 7.834 - 0.647 = 7.19 gpercent water in hydrate = 7.19/7.834 * 100 = 91.74%