Respuesta :
For the calculation of moles, we divide mass of the substance given by the molar mass of the substance.
Its mathematically representation is as follows:
[tex] Number of moles of a substance= \frac{Given mass of a substance}{ Molar mass of substance} [/tex]
Here given mass of substance is 1.09 kg that is 1090 g
Molar mass of the substance is 78 g/mol
So number of moles can be calculated as:
[tex] Number of moles of a substance= \frac{Given mass of a substance}{ Molar mass of substance} [/tex]
[tex] Number of moles of Al(OH)₃= \frac{1090}{78} [/tex]
So number of moles of Al(OH)₃ =13.9 mol
