calculate the number of atoms in 0.75 moles of helium.

Answers 1

Answer:

Since Helium is a monatomic gas, the number of atoms will be the number represented by 1 mole, or 6.022 x 10^23.

1 mole of any substance = 6.023x10^23 of that substance. Here, N=Avogadro’s Number = 6.023x10^23.

1 mole of He gas contains 6.023x10^23 He molecules.

1 He molecule contains only 1 atom(as helium is monoatomic).

So, 1 mole He gas contains 2x6.023x10^23 He atoms.

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