I have oxygen gas at 2 L and 2 atm. At what pressure is the oxygen gas if my volume decreases to 1 L?

The oxygen gas has a pressure of 4 atm if my volume decreases to 1 L.

Explanation:

Given: = 2 L,         = 2 atm

= 1 L,           = ?

Formula used to calculate the new pressure is as follows.

Substitute the values into above formula as follows.

Thus, we can conclude that the oxygen gas has a pressure of 4 atm if my volume decreases to 1 L.

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%

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