Question

Which has more number of atoms, 100grams of sodium or 100 grams of iron.. please do it in steps...​

Answer 1

Answer:

1. 100 g of sodium:

Number of sodium atoms = 2.62 x 1024 atoms.

2. 100 g of iron :

Number of iron atoms = 1.07 x 1024 atoms .

Thus, 100 g of sodium has more atoms.

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Answer 2

Answer:

=> Atomic mass of Na = 23 u (Given)Then, gram atomic mass of Na = 23 g

Now, 23 g of Na contains = 6.022 x 1023 g number of atoms

Thus, 100 g of Na contains = 6.022 x 1023 / 23 x 100 number of atoms

= 2.6182 x 1024 number of atoms

Again, atomic mass of Fe = 56 u (Given)

Then, gram atomic mass of Fe = 56 g

Now, 56 g of Fe contains = 6.022 x 1023 g number of atoms

Thus, 100 g of Fe contains = 6.022 x 1023 / 56 x 100 number of atoms

= 1.0753 x 1024 number of atoms

Therefore, 100 grams of sodium contain more number of atoms than 100 grams of iron.