The Colorado River begins in West Texas and flows more
than 800 miles to Matagorda Bay at the Gulf of Mexico. As
the speed of the river decreases, which factor will likely
increase?

Pressure Increases.

Explanation:

Basically i did a bit of research and came across Bernoulli's principle, which basically says that as speed increases then pressure decreases, and vice versa.

Hope this helps and stay safe

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%