Ervin Toh Wei Yao's answer to Rosie's Secondary 4 E Maths Singapore question.
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You must find the percentage by mass of the aluminum oxide within the compound X, which gives 21.1%.
Thereafter, you must find the percentage by mass of the aluminum element within the aluminum oxide, via calculation of molar mass, which gives 52.94%.
Finally, for the % of the aluminum element within the compound X, taking 52.94% of the 21.1% results in 11.17%, which rounds up to 11.2%.
Thereafter, you must find the percentage by mass of the aluminum element within the aluminum oxide, via calculation of molar mass, which gives 52.94%.
Finally, for the % of the aluminum element within the compound X, taking 52.94% of the 21.1% results in 11.17%, which rounds up to 11.2%.
Date Posted:
19 hours ago
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