Chemistryhard · Past Paper
Which of the following describes the 'Law of Definite Proportions'?
AMass is conserved in a reaction
BElements combine in simple whole number ratios of their masses
CA chemical compound always contains the same elements combined in the same fixed proportion by mass
DThe total volume of gases in a reaction is constant
✓ Correct Answer: C — A chemical compound always contains the same elements combined in the same fixed proportion by mass
This law, proposed by Joseph Proust, states that a given chemical compound always contains its component elements in fixed ratio by mass.
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