Question

Which has more number of atoms -
100g of
Sodium or 100 g of
iron

no irrelevant answers are required​

Answer 1

Explanation:

We know that:

Atomic mass of Na = 23 u

Atomic mass of Fe = 56 u

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)

100 g of Na contains = 2.6182 x 1024 number of atoms

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)

100 g of Fe contains = 1.0753 x 1024 number of atoms

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

Answer 2

Answer:

Hii...

Here is your answer......

Explanation:

Given,

mass of Na = 100 g ;molar mass of Na= 23g.

No. of moles of Na = 100 = 4.343

23

No. of atoms of Na = 4.35× NA.

(NA is the Avogadro no.)

Given,

mass of Fe = 100 g ; molar mass of Fe = 56g

No. of moles of Fe =100 =2.10

56

No. of atom of Fe= 2.10× NA

(Na is the Avogadro No)

So, Na has more no. of atoms .