Answer:
The unknown base should be KOH whose molar mass is 56 g per mol (Answer)
Explanation:
Molarity = moles /(Volume in liters)
So,
Moles = Molarity [tex]\times[/tex] Volume
[tex]\\$=0.219 M \times 289 m L$\\\\$=0.219 \frac{m o l}{L} \times 0.289 L$\\\\$=0.063291 \mathrm{mol}$[/tex]
Molar mass = mass/moles
[tex]\\\\$=\frac{3.50 \mathrm{g}}{0.063291 \mathrm{mol}}=55.3 \mathrm{g}$ per mole[/tex]
The unknown base should be KOH whose molar mass is 56 g per mol (Answer)
