Question

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Answer 1

Answer:

Atomic and Molecular Weights

Thus, oxygen was assigned an atomic mass of 16. We now know that a hydrogen atom has a mass of 1.6735 x 10-24 grams, and that the oxygen atom has a mass of 2.6561 X 10-23 grams.

Answer 2

$\huge\purple\rm{Answer:-}$ (a) $\tt{\frac{16}{6.023\times 10^{23}}g}$

How?

Atomic weight of oxygen=16g/mol

1 g/mol oxygen atom contains $\tt{6.023\times10^{23} =16g}$

Mass of $\tt{6.023\times10^{23}}$  oxygen atoms = 16g

Mass of 1 atom of oxygen = $\sf\green{\frac{16}{6.023\times 10^{23}}$

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