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Which has more number of atoms, 100g of sodium or 100g of iron. How??

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CBSE/Class 9/Science

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100 gram of Na have more atoms. As no of atoms =
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100 g of sodium will have more no of atoms because Mass of 1 mole of an element = atomic mass in grams For example 1 mole of sodium = 23 grams 1 mole of iron = 56 grams And 1 mole = 6.023 × 10^23 nos.
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100 g of sodium as the atomic mass of sodium is less than that of iron and hence 100 grams of sodium contains more number of moles than hundred grams of iron. The number of atoms depend on the number of moles of a substance. Hence the number of atoms in sodium is more than that in iron.
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No of atoms in Sodium is more than the number of atoms in iron. When we calculate the mole of both element the sodium has more mole in comparison to iron that's why the atomic mass of sodium 23u and molar mass of sodium 23 g/mol and the atomic mass of iron is 56 and and molar mass of iron 56 g/mol when... read more

No of atoms in Sodium is more than the number of atoms in iron. When we calculate the mole of both element the sodium has more mole in comparison to iron that's why the atomic mass of sodium 23u and molar mass of sodium 23 g/mol and the atomic mass of iron is 56 and and molar mass of iron 56 g/mol when we calculate the mass of sodium = mass of sodium /molar mass of sodium 

So the mass of sodium is greater than the mass of iron that's why sodium has more no of atoms than iron.

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100 gm of sodium will have more no.of atoms because 100gm of sodium will have 4.3 moles and 100gm of iron will have 1.7 moles when u multiply with the Avogadro number you will get more atoms for sodium rather than iron.
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Sodium
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100gm of sodium
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100g of Na has more atoms than 100g of Fe . Because. Atomic mass of Na=23 and Fe =56 So, for na , given maas/ molar mass × 6.022×10^23 = 100/23 × 6.022×10^23= 2.62×10^24 atoms For Fe , given maas/ molar mass × 6.022×10^23 = 100/56 × 6.022×10^23=... read more

100g of Na has more atoms than 100g of Fe .

Because. Atomic mass of Na=23 and Fe =56

So, for na , given maas/ molar mass × 6.022×10^23 =  100/23 × 6.022×10^23= 2.62×10^24 atoms

For Fe , given maas/ molar mass × 6.022×10^23 =  100/56 × 6.022×10^23= 1.07 ×10^24 atoms

100g of Na has more atoms than 100g of Fe

 

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No of moles = mass / atomic weight For sodium Mass =100 g Atomic mass = 23 g/ mole No of moles for sodium = 100/ 23=4.35 As we know 1 mole =6.022 ×10^23atom Hence for sodium no of atoms = 4.35×6.022×10^23=26.1957×10^23 Now for iron Iron atomic weight =56g/mole Mass (given)=100g No... read more

No of moles = mass / atomic weight 

For sodium 

Mass =100 g

Atomic mass = 23 g/ mole

No of moles for sodium = 100/ 23=4.35

As we know 1 mole =6.022 ×10^23atom

Hence for sodium no of atoms = 4.35×6.022×10^23=26.1957×10^23

 

Now for iron

 

Iron atomic weight =56g/mole

Mass (given)=100g

No of moles= 100/56=1.786moles

No of atoms for iron =1.786×6.022×10^23=10.755×10^23atoms.

Hence for sodium no of atoms will be more than iron for 100g of both substances.

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