A metal oxide hás thẻ formula 'Al2 O3' ....

A metal oxide hás thẻ formula 'Al_2 O_3' . It can be reduced by hydrogen to give free metai and water. 0.1596g of this metal oxide requires 6 mg of hydrogen for complete reduction. What is the atomic weight of metal?

52.3

57.3

55.8

59.3

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