# thermodynamics?

calculate the number of grams of glycerol, C3H5(OH)3 (MW=92.1 g/mol), that must be dissolved in 520 grams of water to raise the boiling point to 102.00 degrees Celsius.

this whole chapter really lost me.

delta T = Kb*molality
delta T = 2 degrees.
Kb = boiling point elevation constant.
molality = calculate
Then convert molality to grams glycerol.

thanks, but what is MW in the question? is that just etra info to throw me off?

No, it isn't an extra and you must use it. After calculating molality, then you must determine the grams glycerol in 520 g H2O to make that molarity.
kg soln x molality x molar mass = grams

1. 👍 0
2. 👎 0
3. 👁 304
1. Right

1. 👍 0
2. 👎 0

## Similar Questions

1. ### chem

You wish to prepare an aqueous solution of glycerol, C3H5(OH)3, in which the mole fraction of the solute is 0.093. How many grams of glycerol must you combine with 425 grams of water to make this solution? What is the molality of

asked by mike on November 22, 2009
2. ### Biochemistry

1. Given the following equation: Glycerol-3-phosphate glycerol + Pi Go’ = -9.7 kJ/mol At equilibrium the concentrations of both glycerol and inorganic phosphate are 1 mM. Under these conditions, calculate the final concentration

asked by Angela on February 11, 2013

1.SOLUBILITY: At 25C, the molar solubility of calcium phosphate in water is 1.1*10^{-7}M. Calculate the solubility in grams per liter. I m not sure how to convert M to g/L MOLAR MASS OF COLLIGATIVE PROPERTIES: 2.tert-Butyl alcohol

asked by Saira on January 24, 2009
4. ### Chemistry 2 Ap

Can someone please help me ? What mass of glycerol must be dissolved in 200.0 g of water to give a solution with a freezing point of -1.50? im not sure how to even start this problem. I think i would find the moles in water first,

asked by jecce. on February 10, 2009
5. ### Chemistry

Calculate the mass in grams of glycerol you would need to make 200 g of a 20% (w/w) glycerol solution.

asked by Anonymous on April 7, 2013
6. ### solutions

How many molecules of glycerol (C3, H8, O3) would be present in 1 L of M glycerol solution? I am thinking it is 6.02 x 10^23 but have also heard conflicting opinions. You don't give the molarity of the C3H8O3. 1 mole of anything

asked by sarah on September 17, 2006
7. ### chemistry

Nitroglycerin is a powerful explosive, giving four different gases when detonated.2 C3H5(NO3)3 (l) → 3 N2 (g) + 1/2 O2 (g) + 6 CO2 (g) + 5 H2O (g)Given that the enthalpy of formation of nitroglycerin, ΔHf°, is −364 kJ/mol,

asked by ogi on March 3, 2012
8. ### Chemistry

The reason why I think gglycerin and glycerol are 2 different molecules is glycerin formula is C3H5(OH)3 and glycerol is C3H8(OH)3. On the site you linked I do not see NaCl. I see sodium chlorate. Are sodium chloride and sodium

asked by April on May 8, 2012
9. ### chemistry

3CuCl2 *2H2O + 2Al = 3Cu + 2AlCl3 + 6H2O Determine the number of grams that should have been produced when 1.25g of copper (2) chloride dehydrate reacts with excess aluminum so i'm not really sure how you're supposed to calculate

asked by julie on November 27, 2014
10. ### science

I need some help with my science homework. Well it is not really my homework it is my study guide but the actual test is the same as the study guide almost. They just switch around the words and stuff around to mess with your

asked by JAKE on February 25, 2008

More Similar Questions