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sweet [91]
3 years ago
10

What is the oxidation number for Al in Al₂O₃?

Chemistry
1 answer:
sesenic [268]3 years ago
4 0
Oxygen in oxides has oxidation number -2.

<span>Al⁺³₂O⁻²₃

+3*2 -2*3=0</span>
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A combustion analysis of 5.214 g of a compound yields 5.34 g co 2 ​ , 1.09 g h 2 ​ o, and 1.70 g n 2 ​ . if the molar mass of th
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Answer is: C₃H₃N₃O₃.
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m(CₐHₓNₓ) = 5,214 g.
m(CO₂) = 5,34 g.
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n(H₂O) = 1,09 g ÷18 g/mol = 0,06 mol.
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n(N₂) = 1,7 g ÷ 28 g/mol = 0,0607 mol.
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n(C) : n(H) : n(N) = 0,121 mol : 0,121 mol : 0,121 mol /: 0,121
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n(CₓHₓNₓOₓ) = 5,214 g ÷ 129,1 g/mol = 0,0404 mol.
n(CₓHₓNₓOₓ) : n(CO₂) = 1 : 3.


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3 years ago
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