Use vsepr to predict the electron pair geometry of o2

A) linear

Explanation:

The oxygen atoms are connected by a double bond. Each oxygen atom also has 2 electron-pairs. Pick one atom to look at and the surrounding areas of electron density. The left O has 3 areas of electron density - 1 atom and 2 electron-pairs. VSEPR predicts the electron-pair geometry of O2 is linear.

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%