Which has more atoms, 100 grams of sodium or 100 grams of iron (given atomic mass of Na = 23 u, Fe = 56 u)?

23g of Na = 6.022 x 10²³ atoms (1 mole)

Therefore, 100g of Na =( 100x 6.022x 10²³)/23 

                                         = (602.2)/23 x10²³

                                         = 26.182 x 10²³

                                         =  2.6182 x 10²⁴ atoms

56g of Fe = 6.022 x 10²³ atom

Therefore 100g of Fe =( 100 x 6.022 x 10²³)/56

                                       = (602.2 x10²³)/56

                                       =10.753 x 10²³

                                       =1.075 x 10²⁴

100g of Na - 2.6182 x 10²⁴ atoms

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Updated on: 14-Mar-2023

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