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a cylinder of He gas has a volume of 25.0L at 22 degrees C and 5.6atm. How many moles of He are in such a cylinder?
Determine the final concentration and Determine What mass of Ar is needed to exert half the pressure (at the same conditions of volume and temperature)?
Dipole moment, Formaldehyde has a very large dipole moment (2.33 Debye) whereas carbon monoxide has a very small dipole moment (0.11 Debye)
In a reaction between pure acetic acid and sodium bicarbonate, 26.6 grams of sodium bicarbonate was added to 12.0 mL of acetic acid. Which reactant is the limiting reactant in this reaction
How much energy in kilojoules is required to convert 100 mL of diethyl ether at its boiling point from liquid to vapor if its density is 0.7138 g/mL.
a 150.0 g sample of metal at 80 c is added to 1500.0g of H2O at 20 c. the temperature rises to 23.3 c. assuming that the calorimeter is a perfect insulator, what is the specific heat of the metal.
How many grams of sulfur (S) are needed to react completely with 355g of mercury (Hg) to form HgS?
Hydrocarbon chemistry problems, For the compound, 1,2-dibromoethane, the most stable conformation would be
When a clear aqueous solution of calcium chloride (CaCl2) is mixed with a clear aqueous solution of sodium carbonate (Na2CO3), a white solid precipitate forms.
If a customer replaces a 85 watt bulb with an 20 watt compact fluorescent bulb that lasts 5000 hours, how much less coal (lbs)will be used to generate the electricity that is saved?
Find the pH of a solution prepared by dissolving all of the following compounds in one beaker and diluting to a volume of 1.00 L: 0.180 moles acetic acid (pKa=4.75), 0.180 mole sodium acetate
if the freezing point of a .106 m CH3COOH solution is -.348 degrees Celsius, calculate the percent of the acid that has undergone ionization?
if a sample of gas at 25.2 C has a volume of 536 mL at 637 torr, what will its volume be if the pressure is increased to 712 torr.
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