A solution is prepared by adding 1.43 mol of KCI to 889 g of water. The concentration of KCI is molal. A) 1.61 times 10^-3 B) 622 C) 0.622 D) 1.27 times 10^3 C) 1.61 What is the mole fraction of oxygen in a gas mixture that is 37% oxygen and 63% nitrogen by volume? A) 0.34 B) 0.37 C) 0.25 D) 0.52 A solution is 2.25% by weight NaHCO_3. How many grams of NaHCO_3 are in 150.0 g of solution? A) 1.50 g B) 3.38 g C) 66.7 g D) 225 g Choose the solvent below that would show the greatest boiling point elevation when used to make a 0.10 m nonelectrolyte solution. A) carbon tetrachloride, K_b = 5.03 degree C/m B) benzene, K_b = 2.53 degree C/m C) diethyl ether, K_b = 2.02 degree C/m D) water, K_b = 0.512 degree C/m E) acetic acid, K_b = 3.07 degree C/m
