Question

Calculate the formula unit mass of Al2 (So4)3 ii) CaCo3

Given atomic mass of AL=27u Ca =40u

Sl = 32u C = 12u

O = 16u O= 16u​

Answer 1

Answer:

I) 342u ii) 100u

Explanation:

I) Al =27

S=32

O=16

atomic mass = 2×26+ 3×32+ 4×3×16

= 54u+96u+192u

= 342u

ii) Ca = 40u

C = 12u

O = 16u

atomic mass = 1×40+ 1×12+ 3×16

= 40u+ 12u+ 48u

=100u