Question

#1: What is the molality of a solution containing 125 grams of iodine (I2) and 750 grams of CCl4?

A. 1.2 m

B. 6.57 m

C. 0.657 m

D. 0.12 m

**my answer: C

is that right? @aaronq :)

Answer 1

#2: How many grams of glucose are dissolved in a 2.88% glucose solution if 1,944 grams of water are used?

A. 28 grams

B. 56 grams

C. 112 grams

D. 1,944 grams

**my answer: B. 56 grams

is that right? :)

Answer 2

you changed grams of I2 to moles? then divided by Kg of CCl4?

Answer 3

2 is good!

Answer 4

#3: Which of the following ways of describing concentration considers the moles of solute divided by kilograms of solvent?

A. molarity

B. molality

C. mole fraction

D. mass percent

***my answer: B. molality

not too sure tho.. :/ maybe i mixed something up? haha can't remember 100% ;/ what do u think? :)

Answer 5

@aaronq yeah for #1 :) idk is that right? cuz i got this... 0.493/0.75 = 0.657 m

is that right? :)

Answer 6

#4: What is the molality of a solution containing 1.567 grams of molten iron (Fe) solvent and 0.0021 grams of molten lead (Pb) solute?

A. 0.0064 m

B. 0.064 m

C. 0.64 m

D. 6.4 m

***my answer: A

is that right?:)

Answer 7

#5: In an experiment, 100 mL of acetone is dissolved in 1.5 L of water to make a solution. Which of the following calculations would be best to describe the concentration of acetone in the solution?

A. volume/volume percent

B. equalities

C. g/L

D. 22.4 L/g

***my answer; A. volume/volume percent

does that look right? :)

Answer 8

and yay for #2!! :) hehe

Answer 9

they're all good!

Answer 10

awesome!! haha thank you sooo much!! :)