1. Water has a K_f of 1.86 C/m. Calculate the new freezing point of an aqueous solution made by mixing 26.02 g water and 2.970 g MgCl₂. (round to four sig figs)

2. A sodium hydroxide solution that contains 39.1 grams of NaOH per L of solution has a density of 1.09 g/mL. Calculate the molality of the NaOH in this solution. ( round to 3 sig figs)

3.What is the concentration of bromide, in ppm, if 25.03 g MgBr₂ is dissolved in 5.81 L water. (round to 3 sig figs)