A gas flows from one container into a larger one. What do you think will happen to its pressure? Draw diagrams to explain.​

Explanation:

If temperature and number of moles of gas remain unchanged, then increasing the volume will result in a decrease in pressure - this is known as Boyle's Law.In other words, when temperature and number of moles of are held constant, pressure and volume have an inverse relationship.

The pressure will decrease.

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%

the answer is symmetrical : )