Al2SO4 find out the molecular mass of the following
Answers
Answer:
150 amu
Explanation:
Al=27
S=32
O=16
Al2SO4
=27×2+32+16×4
=54+32+64
=150 amu
Answer:
342gmol
−1
Explanation:
The idea here is that the molar mass of aluminium sulfate, Al
2
(SO
4
)
3
, will be equal to the sum of the molar masses of all the atoms that make up a mole of this compound.
As you can see, 1 mole of aluminium sulfate contains
∙ two moles of aluminium, 2×Al
∙ three moles of sulfur, 3×S
∙ twelve moles of oxygen, 3×4×0
Now, grab a Periodic Table and look for the molar masses of aluminium, sulfur, andoxygen
∙ M
MAl
=26.981538gmol
−1
∙ M
M
s=32.065gmol
−1
∙ M
M
o=15.9994gmol
−1
In order to find the molar mass of aluminium sulfate, you will need to do
2×M
MAl
+3×M
MS
+12×M
M
O
You will thus have 2×26.981538gmol
−1
+3×32.065gmol
−1
+12×15.9994gmol
−1
which will get you M
MAl
2
(SO
4
)
3
=342.150876gmol
−1
Rounded to the nearest gram, the answer will be
M
MAl
2
(SO
4
)
3
=
342gmol
−1