How many grams of ethyl alcohol added to water
How many grams of ethyl alcohol, C2H5OH, must be added to 1.000 kf of water so that the solution will not freeze until -20 degrees C? For water, Kf= 1.86 degrees C/m.
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If the emitted green light corresponds to an electron dropping from that excited state back down to the ground state, what is the energy spacing (in aJ) between the highest occupied and lowest unoccupied orbitals. The element used is Thallium.
Calculate the energy change in a system in which 56.38 kJ of heat is given off at 2.360 atm pressure and the volume changes from 1.136 L to 0.736 L.
A current of 0.600 A is passed through a cell for 5min and 30 s. How much charge (in C) was trasferred? How many electrons were transfered
Calculate the molecular weight of citric acid if 25.0 mL of a 0.750M sodium hydroxide solution were required to titrate 1.20g of citric acid.
An aqueous solution has a density of 0.80g/mL and is 51.0% C2H6O by mass. Determine the molar concentration of C2H6O.
what is the Hvap of a liquid that has a vapor pressure of 616 torr at 84.1 c and a boiling point of 95.5 c at 1 atm. (answer in J/mol)
Why does the precipitate disappear when H2O is added? It is pushing the reaction to the left; why? It is not more reactant being added. It is changing Ksp but I thought only a change in temp would change K?
When 1.48g of mercuric chloride is vaporized in a 1.00 L bulb at 680 K, the pressure is 225 mm Hg. What is the molar mass of the mercuric chloride vapor
Which of the following statements is/are correct. a) Water is an example of non-polar solvent. b) Any solution always conatins an electrolyte c) NONE d) A solute is always molecules dissolved in water and cannot be ions.
Calculate the pH during the titration of 21.7 mL of 0.451 M KOH with 0.212 M HBr after 18.3 mL of the acid have been added.
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