Question

for each solute identify the better solvent: water or carbon tetrachloride
Na2, I2, CCH2O, C6H6

Answer 1

NH3 = water (it is actually a water soluble gas)
C6H14 = CCl4 (C6H14 won't mix with water at all)
Na2S = water (Na2S is a salt. Salts dissolve best in water)
Br2 = CCl4, but it will also dissolve in water.