Relative Masses and Chemical Formulae Flashcards
1
Q
What does the ‘Ar’ symbol represent?
A
Mass number
2
Q
What does the ‘Mr’ symbol represent?
A
Relative formula mass
3
Q
How can you calculate the relative formula mass of a compound?
A
Adding together the relative atomic masses of all the atoms in its formula
(‘relative atomic mass’ meaning mass number in this case)
4
Q
(Exam-style question)
A
5
Q
What does an empirical formula show?
A
The simplest whole number ratio of atoms in a compound
6
Q
(Exam-style question)
A
7
Q
A
8
Q
What is the equation to calculate the percentage by mass of an element in a compound?
A
9
Q
A
