Fe(ii) ions are there in 20.0 g of FeSO4 (molar mass=151.9 g/mol) ? Avogadro number=6.022× 10²³ is 0.794× 10²³
Mole concept is used for finding out the no of molecules present in a given sample.
Given,
Given mass =20g
Molar mass = 151.9/mol
Avogadro number=6.022× 10²³
We know,
Number of moles= Given mass / Molar mass
Number of moles= 20 / 151.9
Number of moles= 0.132 moles
According to the equation,
FeSO₄ -----> Fe⁺² + SO₄⁻²
Now,
Number of molecules of FeSO₄ = 0.132 × 6.022 × 10²³
Number of molecules of FeSO₄ = 0.794× 10²³
It can be seen from equation,
No. of molecules of FeSO₄ = no. of ions of Fe⁺² = no of ions of SO₄⁻²
No. of ions of Fe⁺² = 0.794× 10²³
Hence, No. of ions of Fe⁺² is 0.794× 10²³.
Learn more about Mole concept here, brainly.com/question/20668126
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