Question

number of helium atoms present in 2mg of helium?​

Answer 1

Answer:

3.0115 is your answer...

Explanation:

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

1 mole of He = 4 gm of He.

So, 2 mg of He contains — (2÷4)×6.023×10^23 atoms

                                              = 12.046 / 4

                                              =3.0115

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Answer 2

Answer:3.0115 is your answer...Explanation:1 mole of He contains 6.023×10^23 atoms. 1 mole of He = 4 gm of He. So, 2 mg of He contains — (2÷4)×6.023×10^