Chemistry Help

[muhammaddildar]

hi
what is the practical us e o f the
quntum chemistry.

[Bianca]

Please Help!
Water has a density of 1.00g/ml while ice has a denstiy of 0.91g/ml. Will a 750-ml bottle that contains 700.0ml of water burst when placced in a frezer? What should this answerbe??

[coolgirl]

The question is:
What would be the osmolarity of a solution prepared by mixing 50 ml of the Dextrose solution with 100 ml of the 0.9% Saline solution?

Here are things that are known:
the osmolarity of the Dextrose solution is .252 Osmol/L and the osmolarity of the 0.9% Saline solution is .308 Osmol/L.

Other things that might be needed:
Osmolarity for the 0.9% saline solution was calculated using--
0.9 g of NaCl in every 100 mL of solution

Osmolarity for the dextrose solution was calculated using--
50 mg of dextrose in every 1 mL of solution

can anyone help me?
again, the question is:
What would be the osmolarity of a solution prepared by mixing 50 ml of the Dextrose solution with 100 ml of the 0.9% Saline solution?

thanks!

[catlover]

Can anyone tell me what is produced when potassium oxide is dissolved?

[laura]

How do you find the limiting reactants of a compound? HELP!!!! High school chemistry at my school is so HARD!

[tom hanks]

How would you prepare 250 mL of a 0.150 M solution of CoCl2 from solid CoCl2 and distilled water

[Linda]

I need help with a problem...Balance the chemical equation...
Al4C3(s)+ H2O(l)---> Al(OH)3(s)+ CH4(g)

Any help would be GREAT!!!
Thanks

[Chris]

Could anyone tell me what the normality of NaOH is? I need a final concentration of 0.2N. How does that relate to molarity>

Thanks

[Karina]

So we have a question for chem. homework and i really don't understand. can you please explain it.....

Question:There is a change in the type of oxides formed with the period three elements. Indicate the type of compounds formed (ionic, amphoteric, covalent) when the period three elements react with oxygen. Give balanced equations.

[kayla]

What is the specimen of choice for enzymes and why?

[ChemHelp]

have you tried www.mychemistrytutor.com

[Ramsey]

I am stuckon a solutions problem. I need 500 g of a 5% aqueous solution. Where do I start. a 37 5 by mass stock solution will be used. I am clueless here. Any help to point me in the right direction would be nice.

[ed garcia]

need help with :
How many milliliters of a .400 M solution can be prepared by dissolving 5.00 grams of NaBr in water?

[chemtutor]

They do free chemistry tutoring and answer questions at http://www.mychemistrytutor.com/forums

[Jessica taylor]

Im a highschooler and lets just say im not the brightest person ever to be made. but they have me taking a chemistry class and im not good at math at all. and i was hoping somebody smart could like help..please ?

[Daniel Smith]

Hi,

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[james]

How many milliliters of a .400 M solution can be prepared by disolving 5.00 grams of NaBr in water? i really need some help with this..

[james]

do you have mr dungan for chemistry?

[crystal]

Who first published the classification of the elements that is the basis of our periodic table today?