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a fost răspuns

Cati atomi de fier sunt cuprinsi intr-un cui cu masa de 5g?

Răspuns :

[tex]\mathtt{A_{Fe}=56g/mol}[/tex]

[tex]\mathtt{56g..........6,023\cdot10^{23} \ atomi}[/tex]

[tex]\mathtt{5g..........x \ atomi}[/tex]

[tex]\mathtt{x=\frac{5\cdot6,023\cdot10^{23}}{56}=0,5377\cdot10^{23}=5,377\cdot10^{22} \ atomi}[/tex]

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