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Which has more number of atoms, 100 gram...

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)?

Text Solution

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`"No. of sodium atoms"=(("Give mass"))/("Gram atomic mass")xx("Avogadro's no")`
`=((100g))/((23g))xx(6.022xx10^(23))=2.618xx10^(24)"atoms"`
(b)100grams of iron
`"No. of sodium atoms"=(("Give mass"))/("Gram atomic mass")xx("Avogadro's no")`
`((100g))/((56g))xx(6.022xx10^(23))=1.075xx10^(24)"atoms"`
100g of sodium have number of atoms.
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