Question

calculate the number of moles for the following
72g of oxygen (finding mole from mass)​

Answer 1

Answer: Given mass = 72g

No. of moles = 72/16 = 4.5 mole

No. of molecules = 4.5x6.22x 10$^{23}$

=279.9x10$^{23}$ molecules

Answer 2

Answer:-279.9x10^ 23molecules.

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