Wednesday
April 16, 2014

Posts by Rukky


Total # Posts: 10

Science
Why can the electronic configuration of some transition element not be written like this;Mg=(Ne)3s2

Chemistry 1200
Freezing-point depression can be used to determine the molecular mass of a compound. Suppose that 1.28 g of an unknown molecule were added to 19.9 g of water and the freezing point of the solution determined. If the new freezing point of water were found to be -1.50°C, wha...

chem
Using the values given, calculate the amount of heat that is liberated when a 2.7-kg bucket of steam at 100.0°C is cooled to give a 2.7-kg bucket of water at 28.0°C. (Condensing steam has −ÄvapH = −2440 J/g and cooling water has cliq = 4.184 J/g·...

chem
determine the osmotic pressure of the solution at STP. (Assume these solutions behave ideally.) a)0.116 mol fraction glucose (C6H12O6) in water (Assume the density of the solution is 1.02 g/mL.) b)0.0948 mol fraction NaCl in water (Assume the density of the solution is 1.00 g/...

Chemistry
The vapor pressure of water at 25°C is 23.76 mm Hg. What would you calculate as the new vapor pressure of a solution made by adding 50.5 g of ethylene glycol (HOCH2CH2OH, antifreeze) to 50.5 g of water? You may assume that the vapor pressure of ethylene glycol at this temp...

Chem 1200
Freezing-point depression can be used to determine the molecular mass of a compound. Suppose that 1.28 g of an unknown molecule were added to 19.9 g of water and the freezing point of the solution determined. If the new freezing point of water were found to be -1.50°C, wha...

Chemistry 1200
Thanks

Chemistry 1200
For each of these solutions, determine the boiling point of the solution 0.238 M glucose (C6H12O6) in water (Assume the density of the solution is 1.00 g/mL.)

Chemistry 1200
0.238 M glucose (C6H12O6) in water (Assume the density of the solution is 1.00 g/mL.) a)0.238 M glucose (C6H12O6) in water (Assume the density of the solution is 1.00 g/mL.)

Chemistry 1200
0.238 M glucose (C6H12O6) in water (Assume the density of the solution is 1.00 g/mL.)

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