Wednesday
May 4, 2016

# Posts by Rukky

Total # Posts: 10

Science
Why can the electronic configuration of some transition element not be written like this;Mg=(Ne)3s2
March 7, 2013

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, ...
January 26, 2011

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·...
January 26, 2011

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/...
January 26, 2011

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 ...
January 26, 2011

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, ...
January 26, 2011

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.)
January 25, 2011

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.)
January 25, 2011

Chemistry 1200
0.238 M glucose (C6H12O6) in water (Assume the density of the solution is 1.00 g/mL.)
January 25, 2011

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