Answer :
(a) The number of sulfur atoms are,
.
(b) The mass of the mass of
is, 1059.682 grams.
(c) The number of moles of
is, ![8.63\times 10^{-3}mole](https://tex.z-dn.net/?f=8.63%5Ctimes%2010%5E%7B-3%7Dmole)
(d) The mass of the mass of
is, ![19.95\times 10^{-22}g](https://tex.z-dn.net/?f=19.95%5Ctimes%2010%5E%7B-22%7Dg)
Explanation :
(a) As we are given the number of moles of
is, 1.75 mole. Now we have to calculate the number of sulfur atoms.
In the
, there are 2 iron atoms, 3 sulfur atoms, 12 oxygen atoms.
As, 1 mole of
contains
number of sulfur atoms.
So, 1.75 mole of
contains
number of sulfur atoms.
The number of sulfur atoms are, ![31.61\times 10^{23}](https://tex.z-dn.net/?f=31.61%5Ctimes%2010%5E%7B23%7D)
(b) As we are given the number of moles of
is, 2.65 mole. Now we have to calculate the mass of
.
![\text{Mass of }Fe_2(SO_4)_3=\text{Moles of }Fe_2(SO_4)_3\times \text{Molar mass of }Fe_2(SO_4)_3](https://tex.z-dn.net/?f=%5Ctext%7BMass%20of%20%7DFe_2%28SO_4%29_3%3D%5Ctext%7BMoles%20of%20%7DFe_2%28SO_4%29_3%5Ctimes%20%5Ctext%7BMolar%20mass%20of%20%7DFe_2%28SO_4%29_3)
The molar mass of
= 399.88 g/mole
![\text{Mass of }Fe_2(SO_4)_3=2.65mole\times 399.88g/mole=1059.682g](https://tex.z-dn.net/?f=%5Ctext%7BMass%20of%20%7DFe_2%28SO_4%29_3%3D2.65mole%5Ctimes%20399.88g%2Fmole%3D1059.682g)
The mass of the mass of
is, 1059.682 grams.
(c) As we are given the mass of
is, 3.45 grams. Now we have to calculate the moles of
.
![\text{Mass of }Fe_2(SO_4)_3=\text{Moles of }Fe_2(SO_4)_3\times \text{Molar mass of }Fe_2(SO_4)_3](https://tex.z-dn.net/?f=%5Ctext%7BMass%20of%20%7DFe_2%28SO_4%29_3%3D%5Ctext%7BMoles%20of%20%7DFe_2%28SO_4%29_3%5Ctimes%20%5Ctext%7BMolar%20mass%20of%20%7DFe_2%28SO_4%29_3)
The molar mass of
= 399.88 g/mole
![3.45g=\text{Moles of }Fe_2(SO_4)_3\times 399.88g/mole](https://tex.z-dn.net/?f=3.45g%3D%5Ctext%7BMoles%20of%20%7DFe_2%28SO_4%29_3%5Ctimes%20399.88g%2Fmole)
![\text{Moles of }Fe_2(SO_4)_3=8.63\times 10^{-3}mole](https://tex.z-dn.net/?f=%5Ctext%7BMoles%20of%20%7DFe_2%28SO_4%29_3%3D8.63%5Ctimes%2010%5E%7B-3%7Dmole)
The number of moles of
is, ![8.63\times 10^{-3}mole](https://tex.z-dn.net/?f=8.63%5Ctimes%2010%5E%7B-3%7Dmole)
(d) As we are given the formula unit of
is, 3. Now we have to calculate the mass of
.
As we know that 1 mole of
contains
formula unit.
Formula used :
![\text{Formula unit of }Fe_2(SO_4)_3=\text{Moles of }Fe_2(SO_4)_3\times 6.022\times 10^{23}](https://tex.z-dn.net/?f=%5Ctext%7BFormula%20unit%20of%20%7DFe_2%28SO_4%29_3%3D%5Ctext%7BMoles%20of%20%7DFe_2%28SO_4%29_3%5Ctimes%206.022%5Ctimes%2010%5E%7B23%7D)
![3=\text{Moles of }Fe_2(SO_4)_3\times 6.022\times 10^{23}](https://tex.z-dn.net/?f=3%3D%5Ctext%7BMoles%20of%20%7DFe_2%28SO_4%29_3%5Ctimes%206.022%5Ctimes%2010%5E%7B23%7D)
![\text{Moles of }Fe_2(SO_4)_3=4.989\times 10^{-24}mole](https://tex.z-dn.net/?f=%5Ctext%7BMoles%20of%20%7DFe_2%28SO_4%29_3%3D4.989%5Ctimes%2010%5E%7B-24%7Dmole)
Now we have to calculate the mass of
.
![\text{Mass of }Fe_2(SO_4)_3=\text{Moles of }Fe_2(SO_4)_3\times \text{Molar mass of }Fe_2(SO_4)_3](https://tex.z-dn.net/?f=%5Ctext%7BMass%20of%20%7DFe_2%28SO_4%29_3%3D%5Ctext%7BMoles%20of%20%7DFe_2%28SO_4%29_3%5Ctimes%20%5Ctext%7BMolar%20mass%20of%20%7DFe_2%28SO_4%29_3)
The molar mass of
= 399.88 g/mole
![\text{Mass of }Fe_2(SO_4)_3=4.989\times 10^{-24}mole\times 399.88g/mole=19.95\times 10^{-22}g](https://tex.z-dn.net/?f=%5Ctext%7BMass%20of%20%7DFe_2%28SO_4%29_3%3D4.989%5Ctimes%2010%5E%7B-24%7Dmole%5Ctimes%20399.88g%2Fmole%3D19.95%5Ctimes%2010%5E%7B-22%7Dg)
The mass of the mass of
is, ![19.95\times 10^{-22}g](https://tex.z-dn.net/?f=19.95%5Ctimes%2010%5E%7B-22%7Dg)