At 20 °C,a 2 $1.0687 \mathrm {~g} \mathrm {~mL} ^ { - 1 }$

At 20 °C,a 2.72 mol L^-1 aqueous solution of ammonium chloride has a density of $1.0687 \mathrm {~g} \mathrm {~mL} ^ { - 1 }$ What is the molality of ammonium chloride in the solution? The formula weight of $\mathrm { NH } _ { 4 }$ Cl is $53.50 \mathrm {~g} \mathrm {~mol} ^ { - 1 }$

A) 0.339 mol kg^-1
B) 2.72 mol kg^-1
C) 0.393 mol kg^-1
D) 13.6 mol kg^-1
E) 2.95 mol kg^-1

Correct Answer:

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