Calculations Flashcards
1
Q
What is the definition for relative atomic mass?
A
The average mass of an element relative to the mass of an atom of carbon-12
2
Q
What is a mole?
A
The unit for the amount of a substance
3
Q
How do you calculate relative atomic mass?
A
1) Multiply the mass of each isotope by its relative abundance
2) Add those two together
3) Divide by the sum of the relative abundances
4
Q
How to calculate relative formula mass?
A
Add all the atomic masses together
5
Q
How to find moles?
A
Mass/Mr(relative formula mass)
6
Q
How to calculate percentage yield?
A
Actual yield/ theoretical yield * 100
7
Q
What is the empirical formula?
A
Simplest formula that tells you the ratio of different elements in the compound
8
Q
What is the molecular formula?
A
The whole number multiplies of empirical formula
