5. assuming the temperature is held constant, how could you increase the pressure inside a
container by a factor of 37

Decrease the volume or increase the number of moles by a factor of 37.

Explanation:

If the contents are a gas,

pV = nRT

If T is constant

There are two ways to increase the pressure inside the container.

1. Decrease the volume

If you decrease the volume by a factor of 37, the pressure will increase by the same factor.

2 Increase the number of moles

If you add 36 times the number of moles, you will have 37n moles. Increasing the amount of gas by a factor of 37 increases the pressure by the same factor.

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%