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A solution is prepared by dissolving 4.21 g of a non-electrolyte in 50.0 g of water. If the boiling point raise by 0.203ºC, explain what is the molar mass of the solute? The boiling point elevation constant for water is 0.512 ºC/m.
Calculate the enthalpy of reaction for the combustion of methane gas, CH4 to form CO2(g) + H20(l)
a mixture of gases containing .20 mol of SO2 and .2 mol of O2 in a 2.0L flask reacts to form SO3. If the temperature is 25C, what is the pressure in the flask after reaction is complete?
When too much H2CO3 is in the blood, the enzyme carbonic anhydrase catalyzes the conversion of carbonic acid, H2CO3, to carbon dioxide, CO2, and water, H2O.
Determine what percent by weight of sodium carbonate does it contain If the specific gravity of the sodium carbonate solution = 1.25,?
Choose any two temperatures and corresponding vapor pressures in the table given, and use those values to calculate ?Hvap for dichloromethane (in kJ/mol).
What mass of sucrose should be combined with 474 g of water to make a solution with an osmotic pressure of 8.20 atm at 310K ?
A corrosion potential of -0.299 V versus SCE was measured for a corroding alloy. what was the potential versus SCE
Exited rubidium atoms emit a photon of light at 759 nm. What color is this light. Calculate the energy difference in kJ/mol of the tow orbitals that give rise to this emission.
Calculate the concentration of the chloride ion if you dilute 25 m of 0.20 M barium chloride to 100 ml with water
In the early days of the periodic table, the 1870s, both silicon and tin were known elements, but germanium was unknown. Using these trends and the densities of silicon and tin that you just obtained, estimate the density of germanium?
the amount of heat released when 20 grams of water cools from 30 degrees celsius to 20 degrees celsius is how many
Calculate the amount of heat evolved in the complete oxidation of 8.17g of al at 25 degrees celcius and 1 atm pressure. delta H of f for al2O3 id -1676kj/mol
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