Question

Determine which of the following contains the greatest mass of aluminium: 122 g of AlPO4, 266 g of A12C16, or 225 g of

A12S3.

Answer 1

Answer : The
`Al_2S_3` contains the greatest mass of aluminum.

Explanation :

For
`AlPO_4` :

Molar mass of
`AlPO_4` = 122 g/mole

Molar mass of aluminium = 27 g/mole

As, 122 g of
`AlPO_4` contains 27 g of Al

So, 122 g of
`AlPO_4` contains
`(122)/(122)* 27=27g` of Al

The mass of 'Al' in
`AlPO_4` is, 27 grams.

For
`Al_2Cl_6` :

Molar mass of
`Al_2Cl_6` = 266.7 g/mole

Molar mass of aluminium = 27 g/mole

As, 266.7 g of
`Al_2Cl_6` contains
`2* 27g` of Al

So, 266 g of
`Al_2Cl_6` contains
`(266)/(266.7)* 2* 27=54g` of Al

The mass of 'Al' in
`Al_2Cl_6` is, 54 grams.

For
`Al_2S_3` :

Molar mass of
`Al_2S_3` = 150 g/mole

Molar mass of aluminium = 27 g/mole

As, 150 g of
`Al_2S_3` contains
`2* 27g` of Al

So, 225 g of
`Al_2S_3` contains
`(225)/(150)* 2* 27=81g` of Al

The mass of 'Al' in
`Al_2S_3` is, 81 grams.

Hence, from this we conclude that
`Al_2S_3` contains the greatest mass of aluminum.