If a balloon is heated, what happens to the volume of the air in the balloon if the pressure is constant?
a. The change cannot be predicted. b. It increases. c. It decreases. d. It stays the same.

Question

If a balloon is heated, what happens to the volume of the air in the balloon if the pressure is constant?
a. The change cannot be predicted.   b. It increases.   c. It decreases.   d. It stays the same.

whpalmer4 · Answer

again, $$PV=nRT$$ is our friend

if P is constant, and T increases, then V must increase proportionally

anonymous · Answer

Which of the following is an example of a polar solvent?
a. water   b. benzene   c. gasoline   d. carbon tetrachloride

whpalmer4 · Answer

to be polar, there has to be a net dipole moment.  benzene is a completely symmetrical ring, so it is not polar.

whpalmer4 · Answer

Carbon tetrachloride has polar bonds, but they are arranged so that they cancel each other out, leaving no net dipole moment.  

Have you seen a diagram of a water molecule?

anonymous · Answer

no

whpalmer4 · Answer

well, it looks a bit like a squashed V

whpalmer4 · Answer

gasoline is made up of non-polar hydrocarbons

water is the only polar molecule in the bunch