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What is the percent by mass of oxygen in al2o3 ?
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What is the percent by mass of oxygen in al2o3 ?

User Miraj Khandaker
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mr oxygen= 16. 16 x 3= 48
mr Al2O3= 27 + 27 + 48= 102

(48/102) X 100%= 47.05% oxygen
User Matteo Piazza
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