Is a polar molecule. The easiest way to figure out whether a molecule is polar or non polar is to use these two principles: for a molecule to be nonpolar the central atom is surrounded by the sea atoms and has no lone pairs. Therefore, F2, O2, N2 are nonpolar (since its the same atoms connected to each other). BeCl2 is also nonpolar since beryllium is connected to two chlorines and...
AP Chemistry consists of the following topics: Structure of the atom, periodic table, ionic and covalent compounds, stoichiometry, gases, liquids and solids, solutions, chemical equilibrium, kinetics, thermodynamics, electrochemistry, acids and bases, laboratory.
Which of the following aqueous solutions has the lowest freezing point?
(A) 0.2 m NaCl
(B) 0.2 m CaCl2
(C) 0.2 m H2SO4
(D) 0.2 m NH3
(E) 0.2 m Al(NO3)3
Answer and Explanation:
Freezing point of a pure solvent depends on the amount of solute that gets dissolved in it. In order to determine which solution has the lowest freezing point, we need to look at the molality as well as whether the solute is ionic or covalent. Since...