Relative Formula Mass Flashcards
0
Q
What is relative formula mass (Mr)?
A
Basically, when you add up all the relative atomic masses. (For eg) MgCl2= 24+ (35.5*2)= 95
1
Q
What is relative atomic mass?
A
A way of saying how heavy different atoms are compared with the mass of an atom of carbon-12. So carbon has Ar of exactly 12. The relative atomic mass is usually the same as the mass number of an element
2
Q
You can convert between miles and grams using what formula?
A
‘Number of moles= mass in grams (of element or compound) / Mr (of element or compound)’
3
Q
One mole of a substance is equal to it’s…?
A
Mr in grams
