Percentage by Mass a.k.a. Mass Percentage
Don’t understand Mass Percentage. Well, neither did anyone else until they practiced it!
Apart from the guy who discovered the technique, he understood it fine.
1. A mole is a certain amount of atoms. In fact its 6.02214179×1023 (6 with 23 zeros after it) atoms. It follows that two moles would be 2 x (6.02214179×1023) atoms.
2. Molar Mass is the total mass of the atoms if you only took 1mol of it, i.e. Carbon has a molar mass of 12g, Oxygen 16g – the bigger number on the periodic table. Another way to look at it is that 6.02214179×1023 (6 with 23 zeros after it) Carbon atoms has a mass of 12g.
This guy has some good ideas.
So does this one.