Question

Find the percentage of carbon in Aluminium carbonate Al2(CO3)3

Answer 1

Answer:

Explanation:

% compositon = ( number of atoms of element × RAM of element × 100)/RMM of compound

Element; Carbon,C

RAM of element; 12

number of atoms of element = 3 atoms of Carbon

RMM of compound = (27×2)+(12×3)+(16×3×3)

                                 =234

% comp of C = (3 × 12 × 100)/234

                     = 3600

                     = 15.38%

Answer 2

Answer:

15.38 %

Explanation:

The total mass of Al2(Co3)3

Al=27

C=12

O=16

Total mass=  (27×2) + (12×3)  + (16×9)

                 =54   +    36   +    144

                 =   234

Now , % of C= 36/234 × 100

                     = 15.38%

Yay! You did it!