Answer:
9.9268 M of ethanol in solution
Explanation:
Molarity and molality are both concentrations of a chemical solution.
Molarity is defined as the ratio of moles of solute present to the volume of the solution (mol/L).
Molality is the ratio of moles of the solute to the mass of the solvent (mol/kg).
So, 1kg of solvent contains; mole of ( ethanol) = 21.71 mol
Mass of ethanol = mole * molar mass
Molar mass of ethanol(C2H5OH)
= (2*12) + (6*1) + 16
= 46 g/mol
= 21.71 * 46 = 998.66 g
= 0.99866 kg
Total mass of SOLUTION = solute + solvent
= 1 + 0.99866 = 1.99866 kg
Volume of solution = mass / mass concentration
= 1.99866/0.914
= 2.187 litre
Molarity = number of mole / volume
= 21.71 / 2.187 = 9.9268 M
