empirical formula

HideShow resource information
Preview of empirical formula

First 103 words of the document:

Write out the masses
Work out the moles
Divide by the smallest number
Show whole number ratio
What is the empirical formula of a compound containing 60.0% sulfur and 40.0% oxygen by mass?
60g 40g
32 16
1.875 2.5
1 1.33
56g of iron combined with 240g of bromine. What is the formula of the iron bromide
formed? (Relative atomic masses: Fe = 56 and Br = 80) [emp21]
BR
240/8
0
3
FE
56/56
1
If 40g of calcium combines with 160g of bromine, what is the formula of calcium bromide?
(Relative atomic masses: Ca = 40 and Br = 80) [Emp13]

Other pages in this set

Page 2

Preview of page 2

Here's a taster:

BR
160/8
0
2
Ca
40/40
1
CAbr2
In an experiment, excess chlorine was passed over 27g of heated aluminium metal until all
the metal had reacted. If 133.5g of white aluminium chloride was formed work out the
formula of aluminium chloride. (Relative atomic masses:Al = 27 and Cl = 35.5) [emp8]
AlCl3
46g of sodium combined with 16g of oxygen.…read more

Page 3

Preview of page 3

Here's a taster:

Comments

No comments have yet been made

Similar Chemistry resources:

See all Chemistry resources »See all resources »