Question

Which has more number of atoms, 100 grams of sodium or 100 grams of iron (given, atomic mass of Na = 23 u, Fe = 56 u)?
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Answer 1

Answer:

sodium has more atoms

Explanation:

iron having more atomic mass will have less atoms

while sodium will have more atoms

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Answer 2

Answer:

Atomic mass of Na =23u

Atomic mass of Fe =56u

Then gram atomic mass of Na =23gram Now 23 g of na contains = 6.022 ×1023 g no of atoms ,Thus 100 g of na contains 2.6182×1023 no then gram of atomic mass of Fe =56g , now 56 gram of Fe contains 6.022 × 1023 g no of atoms thus hundred g of Fe contains 6.022× 1023 /56 × 100 numbers of atoms

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