Question

Calculate the number of moles in 8 gram of Oxygen gas and number of moles in 52 grams of

helium. (Atomic mass O= 16 u, He= 4 u).​

Answer 1

i) No. of moles in 8g of oxygen atom

n= m/M×Na⇒8/16 ×6.02×10^23 =3.01×10^23moles.

so, in the same way you can calculate the number of moles of helium.

Answer 2

Answer:

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