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### Topic: uh i actually have no idea? solutions?  (Read 22876 times)

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#### BAMxTiFFANY

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##### Re: uh i actually have no idea? solutions?
« Reply #30 on: March 15, 2009, 08:20:53 PM »

Dear BAMxTiFFANY;

What is the definition of % w/w?

Good Luck!
ARGOS++

you mean percent by mass of sodium chloride
its the mass of sodium over the total mass times 100

#### ARGOS++

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##### Re: uh i actually have no idea? solutions?
« Reply #31 on: March 15, 2009, 08:30:00 PM »

Dear BAMxTiFFANY;

Correct!, - So please calculate it!

Good Luck!
ARGOS++

#### BAMxTiFFANY

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##### Re: uh i actually have no idea? solutions?
« Reply #32 on: March 15, 2009, 08:34:12 PM »
soo its.. 2.25% :]

#### ARGOS++

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##### Re: uh i actually have no idea? solutions?
« Reply #33 on: March 15, 2009, 08:40:39 PM »

Dear BAMxTiFFANY;

Sorry - NO!

If I remember correctly:
Now we know that 1.050 kg solution contains 73.05 g sodium chloride.

Good Luck!
ARGOS++

#### BAMxTiFFANY

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##### Re: uh i actually have no idea? solutions?
« Reply #34 on: March 15, 2009, 08:57:57 PM »

Dear BAMxTiFFANY;

Sorry - NO!

If I remember correctly:
Now we know that 1.050 kg solution contains 73.05 g sodium chloride.

Good Luck!
ARGOS++

um you just confused me O_O
is it .696?

#### ARGOS++

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##### Re: uh i actually have no idea? solutions?
« Reply #35 on: March 15, 2009, 09:05:59 PM »

Dear BAMxTiFFANY;

Closer!   (But still far by factor 10.)

But if I remember correctly:
!!!!!! Please calculate all times with units  !!!!!!!

I think you confuse yourself most!!
Good Luck!
ARGOS++

#### BAMxTiFFANY

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##### Re: uh i actually have no idea? solutions?
« Reply #36 on: March 15, 2009, 09:39:50 PM »

Dear BAMxTiFFANY;

Closer!   (But still far by factor 10.)

But if I remember correctly:
!!!!!! Please calculate all times with units  !!!!!!!

I think you confuse yourself most!!
Good Luck!
ARGOS++

uh

its ..73.05 over 1050
then times 100.. soo 6.96%

#### ARGOS++

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##### Re: uh i actually have no idea? solutions?
« Reply #37 on: March 15, 2009, 09:43:59 PM »

Dear BAMxTiFFANY;

Exact!

Now we have finished your Question 2.).   Study it very! very carefully once again!!

Please try the other questions by yourself and tell where you run in troubles.
Hint for question 3.):
What is the definition of molality telling you about the solvent (water)?

Good Luck!
ARGOS++

#### BAMxTiFFANY

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##### Re: uh i actually have no idea? solutions?
« Reply #38 on: March 15, 2009, 10:01:54 PM »

Dear BAMxTiFFANY;

Exact!

Now we have finished your Question 2.).   Study it very! very carefully once again!!

Please try the other questions by yourself and tell where you run in troubles.
Hint for question 3.):
What is the definition of molality telling you about the solvent (water)?

Good Luck!
ARGOS++

thanks! x]
i already did the molality for #3 i just cant get  mole fraction for water..