The correct answer is (b) Elements are always present in a fixed proportion by mass in a chemical compound. The Law of Constant Proportion, proposed by Joseph Proust, states that a chemical compound always contains the same elements in the ...
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The correct answer is (b) Elements are always present in a fixed proportion by mass in a chemical compound. The Law of Constant Proportion, proposed by Joseph Proust, states that a chemical compound always contains the same elements in the ...