Molarity of borax solution is 0.104 moles/liter and volume of solution is 100 mL. Molarity is defined as number of moles of solute in 1 L of solution.
It is mathematically represented as follows:
[tex]M=\frac{n}{V}[/tex]
Here, n is number of moles of solute and V is volume of solution.
Thus, number of moles can be calculated as follows:
[tex]n=M\times V[/tex]
Putting the values,
[tex]n=(0.104 mol/L)\times (100 mL)(\frac{10^{-3} L}{1 mL})=0.0104 mol[/tex]
Thus, number of moles of borax is 0.0104 mol. The molar mass of borax is 381.37 g/mol, mass can be calculated as follows:
[tex]m=n\times M=(0.0104 mol)(381.37 g/mol)=3.96 g[/tex]
Therefore, mass of borax is 3.96 g.
