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

Asked by Vishal kumar | 2 years ago |  247

Solution :-

Given: Atomic mass of Na=23u, Atomic mass of Fe= 56u

To calculate the number of atoms in 100g of sodium:

23g of Na contains = 6.022 X 1023 atoms

1g of Na contains = 6.022 X 1023 atoms / 23

100g of Na contains = 6.022 X 1023 atoms X 100 / 23

= 2.6182 X 1024 atoms

To calculate the number of atoms in 100g of sodium:

56g of Fe contains = 6.022 X 1023 atoms

1g of Fe contains = 6.022 X 1023 atoms / 56

100g of Fe contains = 6.022 X 1023 atoms X 100 / 56

= 1.075 X 1024 atoms

Hence, through comparison, it is evident that 100g of Na has more atoms

Answered by Shivani Kumari | 2 years ago

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