Units.Lyon

When dealing with all these laws and equations, units are not all gonig to be the same. Sometimes you will have to convert some amount of one unit into another to make the problem make sense. On this page, I will explain how to:

Go from Kilograms --> Grams --> Moles --> Liters --> Milliliters or go from Milliliters --> Liters --> Moles --> Grams --> Kilograms

So, if you have 360 Kilograms of Hydrogen, how do you turn it into Moles? How do you turn it into Milliliters?

First, we need to convert Kilograms to grams. To do this, you multiply your kilograms (360) by 1/1000

360 • 1/1000 = .36 Grams of H2

From the grams, we must convert into moles. To do this, you multiply the grams given by 1 Mole of the given Gas, divided by the molar mass of your given gas.

.36 grams H2 x __1 mol H2__ = .178 Moles of H2 --2.02 g H2

Thre you have it, your amount of moles of H2, but what about Milliliters? You take the amount of moles you have of H2 and multiply it by 22.4 L over 1 mole of the given gas,this will give you the amount of liters.

.178 moles of H2 x __22.4 L__ = 3.992 Liters. -1 mol H2

Then, to get from Liters to Milliliters, you multiply your liters by 1000.

3.992 x 1000 = 3,992 mL of H2

As one large equation, this is what we just did:

360 Kg of H2 x __1 G__ x __1 Mol H2__ x __22.4 L__ x __1000 mL__ = 3,992 mL of H2 -1000 kgH2  2.02 g H2  1 Mol H2   1L

Now the other way

If i have 256 mL of Oxygen (O2), how many Moles do you have? How Many Kilograms?

256 mL of O2 x __1 L__ = .256 L of 02 -1000 mL

Then you multiply the amount of liters by 1 mole over 22.4 liters to get moles

.256 L O2 x __1 mole__ = .01138 Moles O2 -22.4 L

This is the amount of moles of O2 you have, now moving onto kilgo grams. First, we must find out how many grams are in .01338 moles of O2. To do this, multiply the molar value by 1 mole of your gas (O2) divided by the molar mass of O2

.01138 x __1 Mol O2__= .000355 grams of O2 32 g O2

To finally turn this amount of grams into Kilograms, you must multiply the amount of grams by 1000


 * .000355 x 1000 = 3.55 Kg of O2**

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