Question 1
A solution consisting of 0.250 mol of methylbenzene, C6H5CH3, in 249 g of nitrobenzene, C6H5NO2, freezes at –1.0°C. Pure nitrobenzene freezes at 6.0°C. What is the freezing-point depression constant of nitrobenzene?
◦
4.1°C/m◦
3.5°C/m◦
28°C/m◦
7.0°C/m◦
14°C/mQuestion 2
A solution containing 292 g of Mg(NO3)2 per liter has a density of 1.108 g/mL. The molality of the solution is:
◦
2.00 m◦
2.41 m◦
1.77 m◦
6.39 m◦
none of these are correct