Question

17. Calculate molar mass of aluminium hydroxide ( given atomic mass number
of Aluminium=27, hydrogen = 1, oxygen =16).​

Answer 1

Answer:

78 u

Explanation:

Molecular formula for Al(OH)3

Al=27

O=16

H=1

Therefore molecular mass

=27+(1+16)*3

=27+17*3

=27+51

=78 u

Answer 2

To Calculate the Molar Mass of Aluminium Hydroxide:

Atomic Mass of hydrogen (H) = 1u

Atomic Mass of aluminium (Al) = 27u

Atomic Mass of oxygen (O) = 16u

∴ Formula Unit Mass = 27 + (16 + 1) x 3

Further; - 27 + 17 x 3

Therefore; - 27 + 51 = 78u

⊂↑REQUIRED ANSWER↑⊃