Question

Find out the number Of moles in 12 grams of oxygen gas

Answer 1

no.of moles=given mass of an element÷molecular mass
no.of moles= 12÷32
=3÷8
=0.375mol

Answer 2

Hii There!!!

Given mass of O2 = 12 grams

Molar mass = 16 × 2 = 32 u

By using formula

No. of moles = Given mass / Molar Mass

= 12 / 32

= 3 / 8

= 0.37 moles


Therefore, No. of moles of O2 gas = 0.37 moles.



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