A: A sample of carbon monoxide occupies 3.93 L at 277.0 K and 692 torr. Find its volume at −21°C and 387 torr. L = ?

B: A sample of chlorine gas is confined in a 7.56−L container at 368 torr and 32.0°C.
How many moles of gas are in the sample?
mol Cl2= ?

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%

може ли да зареждате повече информация, моля