Answer: The concentration of 
is 0.08 M.
Explanation:-
According to the neutralization law,
where,
= molarity of 
solution = 0.105 M
= volume of solution = 25 ml
= molarity of solution = ?
= volume of solution = 31.5 ml
= valency of = 1
= valency of = 1
Therefore, the concentration of is 0.08 M.
false all element when they are combined eachother thier valance number will change
the combination of oxygen and aluminum gives us Al2O3 see even the numbers are changing thank you if you have a comment you can write
Moles of ammonium sulfate = 26.42/molar mass of (NH4)2SO4
= 26.42/132.14 = 0.19 mole.
Molarity = moles of ammonium sulfate/volume of solution
= 0.19/50x10^-3
= 3.8M
Well the answer to number 1 is definitely B
number 2 is B
number 3 is D
Number 4 is C
Hope this helps:)
