Answer: 34.58%
Explanation:-
Mass percentage is the ratio of mass of a particular element present in the total mass of the substance in terms of percentage.
[tex]Mass\ %=\frac{\text{Mass of} Al}{\text{Mass of} Al(OH)_3}\times 100\ %[/tex]
Given: mass of AL = 26.98, H = 1.0079, and O = 16.00
Thus mass of [tex]Al(OH)_3=26.98+3\times 16+3\times 1.0079=78.0037g[/tex]
Putting the values in the equation:
[tex]Mass\%=\frac{26.98g}{78.0037g/mol}\times 100\ %=34.58\ %[/tex]
Thus mass percent of aluminum in [tex]Al(OH)_3[/tex] is 34.58%.
