A. 14.29%
B. 25.39%
C. 50.79%
D. 59.25%
Correct Answer:
Option D – 59.25%
Explanation
Al2(SO4)3. 2H2O
2 * 27 + 3*32 + 14 * 16 + 4 * 1 =
54 + 96 + 224 + 4 = 378
% O2 = (224/378) * (100/1) = 59.25%
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