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Calculate the formula masses of following compounds : (i) Sodium oxide, `Na_(2)O` (ii) Aluminium oxide, `Al_(2)O_(3)` (Given : Atomic masses : `Na = 2

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Calculate the formula masses of following compounds :
(i) Sodium oxide, `Na_(2)O`
(ii) Aluminium oxide, `Al_(2)O_(3)`
(Given : Atomic masses : `Na = 23 u , O = 16 u , Al = 27 u`)
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Correct Answer - (i) `62 u` , (ii) `102 u`
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