i do not know how to work this out please help me
Use dimensional analysis,
113.97 liters (1 mol of O_{2}/22.4 liters) (6.02*10^23 molecules/1 mol of O_{2})
Can you finish it?
i do not know how to work this out please help me
Use dimensional analysis,
113.97 liters (1 mol of O_{2}/22.4 liters) (6.02*10^23 molecules/1 mol of O_{2})
Can you finish it?
At STP, the molar volume of an ideal gas is 22.4 L. In other words, the volume of 1 mol of a gas like oxygen is 22.4 L. (mol/22.4L) or (22.4L/mol)
The problem gives you 113.97 L of oxygen. Using dimensional analysis, you can find the number of moles of oxygen.
113.97 L x (1 mol/22.4L) = 5.0879 mol of oxygen.
The problem asks for the number of oxygen molecules and the number of molecules in a mol is 6.02 x 10^23.
5.0879 mol oxygen x ((6.02 x 10^23) oxygen molecules/ mol oxygen ) = 3.06 x 10^24 molecules
First let's figure how many moles of oxygen are present.
At STP, 1 mole occupies 22.4 liters. So,
113.97 liters * (1 mole / 22.4 liters) = 5.09 mole.
Now there are 6.02e23 molecules per mole. So multiplying this by the number of moles, we get
(6.02 x 10^{23} molecules / mole)(5.09 mole) = 3.06 x 10^{24} molecules.^{ }
Hope this helps.