Introduction to Chemistry - Moles, Data & Calculations / pt1 Flashcards
1
Q
how to calculate no of moles: using Ar
A
m
n Ar
m = mass (in g)
n = no of moles
Ar = relative atomic mass
2
Q
Calculating the no of moles: Compounds
A
m
n Mr
m = mass (in g)
n = no of moles
Mr = relative formula mass
3
Q
what is Mr ?
A
sum of the Ars (relative atomic mass)
4
Q
how can be ratios referred to ?
A
stoichiometry
5
Q
what is accuracy ?
A
close to the centre/target
6
Q
what is precision ?
A
how consistent data is and reproducibility
7
Q
mesure of mole
A
6.02 x 10 to the power of 23
