Answer: 0.4578 g
Explanation:
Molarity of a solution is defined as the number of moles of solute dissolved per Liter of the solution.
[tex]Molarity=\frac{n\times 1000}{V_s}[/tex]
where,
n= moles of solute
[tex]Moles=\frac{\text{Given mass}}{\text{Molar mass}}=\frac{xg}{182.71g/mol}[/tex]
[tex]V_s[/tex] = volume of solution in ml = 25.0 ml
[tex]0.100M=\frac{x\times 1000}{182.71\times 25}[/tex]
[tex]x=0.4578g[/tex]
Thus 0.4578 g of nickel(II) nitrate is to be dissolved in 25.0 mL of 0.100 M [tex]Ni(NO_3)_2[/tex] solution.