Hydrogen and oxygen combine in the ratio of 1: 8 by mass to form water. What will be the mass of hydrogen in 45 g of water
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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.
1 g of hydrogen reacts with 8 g oxygen
Thus, in order to form water, 3 x 8 = 24 g of oxygen will react completely with 3 g of hydrogen gas.
So, answer is 24 g oxygen.
Explanation:
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