Question

mass in grams of 1.05 moles of CuSO4.5H2O

Answer 1

Answer:-

262.5 g

Explanation:-

• Molar mass of Copper (Cu) = 64 g/mol

• Molar mass of Sulphur (S) = 32 g/mol

• Molar mass of Hydrogen (H) = 1 g/mol

• Molar mass of Oxygen (O) = 1 g/mol

∴ Molar mass of CuSO₄.5H₂O :-

= 64 + 32 + 16×4 + 5(1×2 + 16)

= 96 + 64 + 5(18)

= 160 + 90

= 250 g/mol

Now, we know that :-

Mass = No of moles × Molar mass

=> Mass = 1.05 × 250

=> Mass = 262.5 g

Thus, mass of the sample is 262.5g .

Some Extra Information:-

No of moles :-

(1) Given Mass/Molar mass

(2) No of particles/Avogadro Numver

Molar mass :-

= Mass/No of moles

Number of atoms/molecules :-

= No of moles × Avogadro Number