Question

An aqueous KNO3 solution using 72.5 g of KNO3 diluted to a totalsoultion volume of 2.00 L. Calculate the molarity, molality, andmass percent of the solution (assume density of 1.05 g/mL).

A sioxin-contaminated water source contains 0.085% dioxin bymass. How much dioxin is present in 2.5L of this water? Assume adensity of 1.00 g/mL.

A solution is prepared by dissolving 20.2 mL of methanol(CH3OH) in 100.0 mL of water at 25 degrees celsius. Thefinal volue of the solution is 118 mL. The densitites of methanoland water at this temperature are 0.782 g/mL and 1.00 g/mL,respectively. For solution, caculate the concetation of eachunit.

a. molarity

b. molality

c. percent by mass

d. mole fraction

e. mole percent