Question

which has more no of atoms 100 grams of sodium or 100 grams of iron

Answer 1

☆☆ AS-SALAMU-ALYKUM ☆☆

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NUMBER OF MOLES = MASS ÷ MOLAR MASS

MOLAR MAS OF SODIUM= 23g/ mol

MOLES OF SODIUM = 100÷23

MOLES OF SODIUM = 4.34 mol

MOLES = NUMBER OF ATOMS ÷ AVAGADRO NUMBER

NUMBER OF ATOMS OF SODUM = MOLES OF SODIUM × AVAGADRO NUMBER

NUMBER OF ATOMS OF SODIUM = 26.1× 10^23

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NOW

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MOLES OF IRON = MASS÷ MOLAR MASS

MOLAR MASS OF IRON = 56g/mol

MOLES OF IRON = 100÷56

MOLES OF IRON = 1.78mol

NUMBER OF ATOMS OF IRON = MOLES × AVAGADRO NUMBER

NUMBER OF ATOMS OF IRON = 1.78 × 6.023 × 10^23

NUMBER OF ATOMS OF IRON = 10.75 × 10^23

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SO IRON HAS MORE ATOMS
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