Question

Please answer these questions:
1.Why is carbon atom chosen as the standard unit for measuring masses of other atoms or molecules?
2.How can you calculate relative molecular mass and percentage of composition of a compound?

Answer 1

1.At that time they used hydrogen to measure masses of other atoms as it was a simple and basic type of atom which has only one electron

Answer 2

Answer:

1. In 1961 carbon -12 was finally selected because its other option least affected the values of the atomic mass of the various elements in the old standards.

2. the relative atomic mass or atomic weight of an element is the number of times one atom of the element is heavier than one by 1/12 times of the mass of an atom of carbon -12.

Thus,relative atomic mass = mass of one atom of the element by 1/12th the mass of one C -12 atom

Explanation:

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