Molar mass and percentage by mass Flashcards
1
Q
What is the definition of molar mass?
A
The mass (in g) of 1 mole of substance
2
Q
What is the unit for molar mass?
A
gmol-1
3
Q
How do you calculate the percentage by mass of an element in a compound?
A
% by mass = (Relative mass of the atoms of the element / Total mass of the compound (Mr)) x 100
