# chemistry

posted by .

now am stuck on how to find the grams of X+Y=1.10
X for glucose and Y for sucrose

3.78/24.45=0.1546M
0.1546*0.025=0.003865 moles. now am stuck. help please

• chemistry -

First mistake.
3.78 = M*0.08205*298
Solve for M.
Then M = moles/L
L = 0.025, not 24.45.
Then you solve two simultaneous equations which I set up earlier. It becomes a math problem then, and not a chemistry problem. I assume you know how to solve two equations simultaneously.
(X/180) + (Y/342) = moles
X + Y = 1.10 grams.
========================
Solve equation 2 for, say, X.
X = 1.10 - Y
Now substitute X (which is now 1.10-Y) into equation 1 and solve. The X will disappear, Y will be what you solve for, then substitute Y back into equation 2. You now have X and Y; ;i.e., grams glucose and grams sucrose. Then you can do percent from this.

## Similar Questions

1. ### Chemistry

mass-mass conversions and mass-mole conversions: what is the difference and how do you do each?
2. ### Chemistry=MOLES!

I'm having trouble converting moles to grams and finding the mass of molecules. Problems I'm stuck on: What is the mass in grams of .99x10^49 Sodium Chloride Molecules?
3. ### college chem

A 1.10g- sample contains only glucose and sucrose . When the sample is dissolved in water to a total solution volume of 25.0ML , the osmotic pressure of the solution is 3.78atm at 298K a.What is the percent by mass of glucose in the …
4. ### Chemistry

Which of the solutions has the greatest osmotic pressure?
5. ### math

i am having a minor difficulty i've been stuck for over an hour and don't know what to do i don't know is this right ?
6. ### re:math

i am having a minor difficulty i've been stuck for over an hour and don't know what to do i don't know is this right ?
7. ### Chemistry

I need help with this problem please Calculate the amount of reagents you take to prepare 200 g of 9.0% (m/m) glucose solution?
8. ### Ap Chemistry

I'm doing the calculations on the lab "Oxidizing Power of Laundry Bleach," and I'm stuck on one part. This is what I have so far: My average volume of sodium thiosulfate is 6.94 ML. I then converted that into moles and got 6.94X10^-4 …
9. ### Chemistry

Reviewing for final (this should be basic but...I am stuck): Describe how you would prepare 500.0 grams of a solution of sucrose, C12H22O11, in water which the mole fraction of sucrose is 0.125. I feel like somehow this is a molality …
10. ### Chemistry

calculate the change in ph for 1l of buffer solution containing NH4OH and NH4Cl upon addition of 1) 0.02 moles of HCl 2) 0.02 moles of NaOH I got the initial pH as 9.2504 But now Im stuck cus I dunno what happens when we add HCl and …

More Similar Questions