When 0.500 g of vitamin k is dissolved in 10.0 g of camphor (kf = 40.0°c/m), the freezing point of the solution is 4.43°c lower than that of pure camphor. assuming vitamin k is a nonelectrolyte in camphor, calculate its molar mass. 55.4 g/mol 451 g/mol 0.451 g/mol 3.54 × 104 g/mol?

Which part of earth’s surface receives the most direct rays from the sun? a) equator b) ocean c) poles d) mountains

The lattice enthalpy (formation of ionic solid from ions in the gas phase) for agcl(s) is -916 kj/mol and the hydration enthalpy (dissolution of gaseous ions into water) is -850 kj/mol. how much heat (in joules) is involved in forming 1l of saturated agcl solution (1.8 × 10-4 g / 100 ml water) by dissolving agcl(s)? assume solution volume does not change much upon dissolution. the equations are given below. ag+(g) + cl−(g) æ agcl(s)

How many grams of sodium chloride are in 250ml of a 2.5m naci solution