Question

Which has the higher percentage of aluminum, Al2O, or Al(NO3)3

Answer 1

Al₂O  has a higher percentage of aluminium.

Explanation:

To solve this problem, we have to compare the molar mass of the aluminium in each compound to one another as percentage of the whole compound:

Molar mass of Al₂O = 2(27) + 16 = 70g/mol

Molar mass of Al(NO₃)₃ = 27 + 3[14 + 3(16)] = 213g/mol

Percentage by mass of Al in Al₂O = $\frac{2x27}{70}$ x 100 = 77%

Percentage by mass of Al in  Al(NO₃)₃ = $\frac{27}{213}$ x 100 = 12.7%

Al₂O  has a higher percentage of aluminium.

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Molar mass brainly.com/question/2861244

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