1. a. Is it true that when you add impurities on solution, Osmotic pressure increase and
b. water tends to move from low osmotic pressure -> high osmotic pressure?



2. Im very confused on permutation/combination. can someone clarify it?


such as if there are 3 redballs, 4 yellow, 5 green,

a. how many possible 3 balls in a group I can put them together? -> is this permutation? combination?

b.what is the prob. of drawing a red, yellow, green ball without replacement?
-> permutation?/ combination?



3.H-bond > dipole-diple moment

but, what's the difference b/t dispersion force, van der-walls, London force?

and neighboring polar makes non-polar instantaneously polar is called what?
& instantaneously polar makes neighboring instantaneously polar is called what?




4. enough H20 is added to 11g of CaCl2(110g MW) to make 100 ml of solution,
what's the molarity?
:I think 11g/110g = .1 mole and .1mole/.1L = 1 M, but answer is 10 M.



thank you!

4. enough H20 is added to 11g of CaCl2(110g MW) to make 100 ml of solution,
what's the molarity?
:I think 11g/110g = .1 mole and .1mole/.1L = 1 M, but answer is 10 M.



You may need to recheck your problem. The 11g/100ml will only give you a 1M solution and certainly not a 10M.