C4 - Chemical Equations Flashcards
1
Q
What is relative atomic mass?
A
The average mass of atoms of an element, compared with carbon -12, weighed according to the abundance of isotopes
2
Q
What is the mass number?
A
Mass number of protons and neutrons in an atom
3
Q
What is Relative formula Mass (Mr) of a compound?
A
The sum of the relative atomic masses of the atoms in the numbers shown in the formula
4
Q
Relative formula mass(Mr) of H(1)Cl(35.5)
A
1 + 35.5 = 36.5
5
Q
Relative formula mass(Mr) of Na(23)O(16)H(1)
A
23 + 16 + 1 = 40
