(b) 0.5 mole of aluminium sulphate (AL2(SO4) 3]
Answers
Answer:
As you can see from the formula, in each aluminium sulfate ( Al2(SO4)3Al2(SO4)3 ) molecule, there are 2 aluminium ( AlAl ) atoms, 3 sulfur ( SS ) atoms and 12 oxygen ( OO ) atoms.
2 aluminium atoms and 12 oxygen atoms. That means that the ratio of aluminium atoms and oxygen atoms is 1:6.
“mol” is basically a certain amount of particles of anything. It’s not vital for this question, but in case you encounter a question that requires the following information, 1 mol is roughly 6.02⋅10236.02⋅1023 particles of the referred atom/molecule. TL;DR: mol is directly proportional to the amount of particles, and 1 mol=6.02⋅1023 particles1 mol=6.02⋅1023 particles .
There are 0.5 mol0.5 mol of aluminium, and the ratio of aluminium and oxygen is 1:6. Therefore:
nO=61⋅0.5nO=61⋅0.5
nO=3nO=3
In conclusion, there are 3 mol of oxygen