The electron pair geometry of a molecule is tetrahedral. what is its bond angle if it shows one lone pair of electrons and three bonding pairs? less than 109.5°more than 109.5°equal to 109.5°zero

I think the correct answer is 109.5 degrees. The bond angle of a chlorite ion or ClO2- ion is 109.5 and has a bent shape. This is because of two groups of bonding electrons and two lone pairs of electrons. Another example of a molecule that has a bent molecular geometry is water. It results from its tetrahedral electron pair shape.

specific gravity is the density of a substance divided by the density of water. since (at standard temperature and pressure) water has a density of 1 gram/cm3, and since all of the units cancel, specific gravity is usually very close to the same value as density

so "c" is the answer

plz give brainliest

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%