What is the volume of .00831 mol of gas under ideal conditions if the pressure is 1.01 atm and the temperature is 25 degrees C?*

Approximately .

Explanation:

Convert the temperature of this gas to absolute temperature:

.

Let and represent the pressure and volume of this gas, respectively. Let represent the number of gas particles in this gas. Let represent the ideal gas constant. By the ideal gas law:

.

For this question:

Look up the ideal gas constant that takes as the unit for pressure:

.

This question is asking for , the volume of this gas. Rearrange the ideal gas equation and solve for :

.

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 awnser is group 12