After analyzing a sample of 0.085 g Aluminium oxide compound , it is found that it contains 0.045 g of aluminium and 0.04 g of oxygen.Calculate the percentage composition of the compound by weight .
45.5 % Aluminium & 4.5 % Oxygen
9% Aluminium & 8 % Oxygen
52.94% Aluminium & 47.05% Oxygen
52% aluminium & 48 % Oxygen
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the area of rectangle is 600cm 2
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