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how many moles of dioxygen are present in 64g of dioxygen??(molecular mass of dioxygen is 32) I need the answer in steps and do we need to multiply with avagadro number
1 mole = 6.023 x 1023 atoms    (or)
            = mass / Molar mass in gms

The no. of moles in 64 gms of dioxygen are
            = 64 / 32
            = 2
 1 mole of dioxygen contains 6.023 x 1023

         2 moles contains = 6.023 x 1023 x 2
                                        = 12.046 x 10 23



                       


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