C4- Chemical calculations Flashcards
1
Q
what is relative atomic mass
A
Relative atomic mass = the average mass of all the isotopes of an element, relative to C-12
2
Q
what is mass number
A
Mass number = the total amount of protons+neutrons
3
Q
what does Aᵣ mean
A
Ar = relative atomic mass - (for a single atom)
4
Q
what does Mᵣ mean
A
Mr = relative molecular mass (for a compound)
5
Q
what does mole mean
A
A mole is a measurement for a certain number of atoms/particles/molecules
We call this number Avagrado’s constant
6
Q
what is Avagrado’s constant
A
Avagrado’s constant = 6.02x10^23
7
Q
What formula would you use to calculate mass from moles?
A
Mr x Mole = Mass
8
Q
A
