Question
Asked Dec 2, 2019
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an unknown element, X, reacts with oxygen to form two oxides with the general formula X2O3 and X2O5. the pure element is strongly paramagnetic, and the oxides are amphoteric. Which of the following elements could be represented by X?

a. Sc

b. Na

c. Bi

d. S

e. Sb

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Expert Answer

Step 1

The oxidation states of the oxides X2O3 and X2O5 can...

Х,0;:
2 (х)x3(-2)3D0
2хx-6%3D0
2х 3 6
6
х%3D +3
2
х.о:
2(х)x5(-2)30
2хx-10%3D0
2х %3D10
10
= +5
2
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Х,0;: 2 (х)x3(-2)3D0 2хx-6%3D0 2х 3 6 6 х%3D +3 2 х.о: 2(х)x5(-2)30 2хx-10%3D0 2х %3D10 10 = +5 2

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