Question

Help please! Will become fan..

Answer 1

@thomaster please help me..

Answer 2

@satellite73 help?

Answer 3

which question? or both

Answer 4

yes for both please.

Answer 5

okay the first one is B because colligative properties depends mainly on the quantity of solute molecules present, not necessarily their identity

Answer 6

Alright, then how would you find the next one?

Answer 7

Normal boiling point of water 100˚C
Increase of boiling point is 5˚C
Boiling point elevation constant is 0.512˚C per mole
so the increase = moles * 0.512
Moles = increase / 0.512

the increase is 5 so 5/0.512 = 9.77 mol

Answer 8

alright thank you, can you check my answer?

Answer 9

Vapor pressure is proportional to mole fraction (Raoults Law).
200 g x 1 mol/18 gm = 11.11 moles water
720/745 = 0.966 mol fraction of water after glucose is added. therefor mole fraction glucose=0.034
moles glucose/moles glucose + 11.11 = 0.034
0.966 molesGlucose =0.378
molesGlucose = 0.378/0.966 = 0.39 moles Glucose

Answer 10

Alright thanks. What about this one?

Answer 11

arrhenius and brønsted-lowry

Answer 12

Thank you, what about this one?

Answer 13

Br-

Answer 14

Thanks can you help me on the first question & check my second?

Answer 15

@thomaster you still there?

Answer 16

0-7 = acid
7-14= base