if 88 gm of oxygen combines 11 gm of hydrogen how much water be formed
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Answer:
The law of constant proportions states that in a chemical substance, the elements are always present in definite proportions by mass. Hydrogen and oxygen combine in the ratio of 1:8 by mass to form water.
1g of hydrogen reacts with oxygen = 8g
Thus, in order to form water, 3 x 8 = 24 g of oxygen will react completely with 3 g of hydrogen gas.
Concept insight: Recall the law of constant proportions and then apply that in a chemical substance, the elements are always present in definite proportions by mass.
OR
2H
2
+O
2
→2H
2
O
4g 32g 36g
Since, 32 g of oxygen reacts with 4g of H
2
.
So, 3g of H
2
will require =
4
3×32
=24 grams of O
2
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