Chemistry
Grade-8
Easy
Question
A pure sample of ammonia contains 28 g of nitrogen and 3 grams of hydrogen. A second sample of pure ammonia contains 56 g nitrogen and 6 g of hydrogen. This is an example of the:
- Law of conversation of mass
- Law of multiple proportion
- Law of constant proportion
- Law of reciprocal proportion
Hint:
One molecule has 28g nitrogen and 3 g hydrogen. Two molecules will have the double have both. So if nitrogen increases hydrogen will also increase.
The correct answer is: Law of constant proportion
- The law of constant proportions states that a compound is composed of a constant mass proportion of elements. This means that regardless of the source, a pure sample of a compound will always consist of the same elements present in the same mass ratios.
- The law of definite proportions is often called Proust's law or the law of definite proportions.
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