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Q 2. 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)?
Given
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
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Personalized AI Tutor and Adaptive Time Table, Self Study Material, Unlimited Mock Tests and Personalized Analysis Reports, 24x7 Doubt Chat Support,.
Personalized AI Tutor and Adaptive Time Table, Self Study Material, Unlimited Mock Tests and Personalized Analysis Reports, 24x7 Doubt Chat Support,.
Personalized AI Tutor and Adaptive Time Table, Self Study Material, Unlimited Mock Tests and Personalized Analysis Reports, 24x7 Doubt Chat Support,.
Personalized AI Tutor and Adaptive Time Table, Self Study Material, Unlimited Mock Tests and Personalized Analysis Reports, 24x7 Doubt Chat Support,.
The number of moles of 100 g Na atoms :
The number of moles in 100 g of Fe atoms :
As we know, the one-mole atoms contain
atoms.
So, more the number of moles, more the number of atoms. and hence 100 g of Na atom has a greater number of atoms than 100 g Fe.