Relative Atomic Mass / Percentage Mass Flashcards
0
Q
What is relative formula mass and how do you work it out
A
The relative formula mass is the top number shown on an atom. To work out the mass you add up the numbers e.g —- CO2 = 12 + 16 + 16 = 44
There is two oxygens so you add them both
1
Q
How can you calculate the percentage of an element in a compound?
A
Mass of element divided by mass of compound x 100
2
Q
What is a MOLE?
A
A mole is a unit for the amount of substance. E.g a mole of carbon weighs 12g
