Question

8. The total number of atoms in 4g of oxygen molecule is
a) 6.023 x 10^23 b) 7.52 x 10^22 c) 1.5055 x 10^23 d) 0.0752 x 10^23
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Answer 1

Answer:

7.52×10^22

Explanation:

Moles of oxygen=4/5=0.125mole,

Molecules of oxygen=0.125×6.022×10^23=7.52×10^22

Answer 2

Answer:

b,correct

Explanation:

32g oxygen contain 6.022×10^23molecule

4g contain=

(6.022×10^23÷32)×4

=7.52×10^22