Question

Which has more number of atoms: 100 grams of sodium or 100 grams of iron (Given atomic mass of a = 23 u and F = 56 u)...if u dont give the right answer.i will simply report u..thank u

Answer 1

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

Explanation:

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Answer 2

Answer:

100 grams of Sodium = 4.34 moles

100 grams of Iron = 1.78 moles

We know that,

No of Moles ∝ No of Atoms

∴100 grams of Sodium has more atoms than 100 grams of Iron.

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