Q.
27 g of Al will react completely with how many grams of oxygen ?
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a
8 g
b
16 g
c
32 g
d
24 g
answer is D.
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Detailed Solution
4 Al + 3O2 → 2 Al2O3At. Wt. of Al = 27Thus 4 × 27 g of Al reacts with 3 × 32g ofoxygen∴mass ofoxygen that reacts with 27 g of Al = 3× 324× 27 × 27=24g.
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