Question

calculate the number of atoms present in 24g of helium. (He=4u)​

Answer 1

Explanation:

1 mole of He contains 6.023×10^23 atoms.

1 mole of He = 4 gm of He.

So, 20 gm of He contains — (24÷4)×6.023×10^23 atoms = 36.132×10^23 He atoms.

Answer 2

Answer:

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