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The heat of vaporization of diethyl ether (CH3CH2OCH2CH3) is 26.0 kJ/mol and its vapor pressure at 18 Celcius is 401 torr. What is the normal boiling point of diethyl ether?
how many moles of oxygen are required to react completely with 5 mol C8H18?
Estimate the value of the equilibrium constant at 685 K for each of the following reactions. Delta H and S for BrCl(g) is 14.6 kJ/mol and 240.0 J/ mol * K, respectively. 2 NO_2(g) > N_2O_4(g.
An excess of aluminum foil is allowed to react with 225 mL of an aqueous solution of HCl (d = 1.088 g/mL) that contains 18.0% HCl by mass.
The rate constant of a certain reaction is known to obey the Arrhenius equation, and to have an activation energy
Look up the chemical structure of ibuprofen. Do you think it inhibits the inflammation cascade in the same way as aspirin? Why or why not?
50.0 mL of a 1.70 M solution is diluted to a volume of 248 mL. A 124-mL portion of that solution is diluted using 185 mL of water. What is the final concentration
A hypothetical metal has a simple cubic unit cell and its atomic radius is 1.167 Å. Calculate the edge length of the unit cell. A hypothetical metal has a face-centered cubic unit cell and its atomic radius is 1.738
One sample had a mass of 25 grams. The other had a mass of 50 grams. Would the same number of particles be ejected from each sample in the first hour?
A small immersion heater is used to heat 475 mL of water from 75 degrees Fahrenheit to 195 degrees fahrenheit in 5.00 minutes.
What is the PH of a 0.085M solution of ammoniun chloride. Kb for ammonia is 1.8 times, Calculate the pH fo a solution made by mixing 125ml of .200M HCl and 500 ml fo 0.0500M KOH
how many grams of water are consumed if 4.0 g of hydrogen gas and 32.0 g of oxygen are produced
First determine the number of moles of rm Na^+ using the given molarity and volume. Next, use the chemical formula to determine the number of moles of rm Na_3PO_4 needed. Finally, convert moles to grams using the molecular weight of the compound.
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