1.

If I have 17.5 moles of helium, how many individual atoms of Helium do I have?

Answer»

Explanation:

given:

no of moles of HELIUM =17.5

To find :

no of INDIVIDUAL ATOMS of helium

Finding:

Number of moles of helium = no of individual atoms of helium/ avogadro number

Number of individual atoms of helium

= Number of moles of helium × avogadro number

= 17.5 × 6.022 × 10^23

= 105.385 × 10^23

= 1.05 × 10^25 atoms of helium

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