juanita dissolves 46 g of mgbr2 (molar mass: 184.11 g/mol) in 0.5 kg of distilled water. what is the…

juanita dissolves 46 g of mgbr2 (molar mass: 184.11 g/mol) in 0.5 kg of distilled water. what is the molality of the solution? use molality = \\frac{moles of solute}{kilograms of solvent}. 0.5 m 2 m 8 m 90 m

juanita dissolves 46 g of mgbr2 (molar mass: 184.11 g/mol) in 0.5 kg of distilled water. what is the molality of the solution? use molality = \\frac{moles of solute}{kilograms of solvent}. 0.5 m 2 m 8 m 90 m

Answer

Explanation:

Step1: Calculate moles of solute

Use the formula $n=\frac{m}{M}$, where $m = 46\ g$ is the mass of solute and $M=184.11\ g/mol$ is the molar - mass. So $n=\frac{46}{184.11}\ mol\approx0.25\ mol$.

Step2: Calculate molality

Use the molality formula $m=\frac{n}{m_{solvent}}$, where $n$ is the moles of solute and $m_{solvent}=0.5\ kg$ is the mass of the solvent. Substitute $n = 0.25\ mol$ and $m_{solvent}=0.5\ kg$ into the formula: $m=\frac{0.25}{0.5}\ mol/kg = 0.5\ m$.

Answer:

0.5 m