moles Flashcards
1
Q
what type of quantity
A
chemical
2
Q
1 mole =
A
6 X 10^23
3
Q
one mole of any element has a mass equal to its
A
relative atomic mass
4
Q
1 mole of mg
A
24g (RAM) of Mg
5
Q
1 mole of s =
A
32g (ram) of S
6
Q
when you have a compound (eg MgS) you add together the moles
A
eg
RAM of s = 32g
RAM of Mg = 24g
32+24=56
56g of MgS
7
Q
Eg Li2S - what is one mole
RAM of Li=7
RAM of S = 32
A
7+7+32= 46g
8
Q
moles =
A
mass/rfm
9
Q
what % of CaCO3 is C
CaCO3 RFM = 100
C RAM = 12
A
12/100 X 100 = 12%
