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A compound of P and F was analyzed as follows: Heating 0.2324 g of the compound in a 378-cm3 container turned all of it to gas, which had a pressure of 97.3 mmHg at 77°C. Then the gas was mixed with calcium chloride solution, which converted all the F to 0.2631 g of CaF2. Determine the molecular formula of the compound.
a 4.82-gram sample of a compound is dissolved in enough water to form 100.0 ml of solution. this solution has an
The equilibrium internuclear distance of deuterium iodide, DI, is 160.4 pm, where 1 pm = 1x10-12m. The relevant atomic masses are: mD = 2 amu and mI = 127 amu
in writing the lewis structure when we do not have to worry about electrons distribution in each atom alone and when we
explain why addin eletcrons to a bonding orbital leads to bonding of an atom, in terms of electron distribution
A 475 mL sample of gas is collected over water at 27°C and a total pressure of 675 mm Hg. If the vapor pressure of water at 27°C is 26.7 torr, what is the volume of the gas sample at standard pressure?
The insect repellent DEET is an amide that can be made from 3-methylbenzoic acid and diethylamine. A 5.6 fl oz can of DEET repellent contains 25% DEET by mass (1 qt = 32 fluid ounces).
Calculate the heat released when 71 g of steam at 116 degrees C is converted to water at 39 degrees C.
What concentration of aqueous NaCl solution freezes at -15.2ºC? The freezing point of pure water is 0.0ºC and Kf of pure water is -1.86ºC/m.
Write a ratio that compares the rate of diffusion for carbon monoxide gas to the rate of diffusion of oxygen gas.
A solution is prepared by dissolving 0.19 of acetic acid and 0.19 of ammonium chloride in enough water to make 1.0 of solution. What is the concentration of Ammonia in the solution
The gas from a certain volcano had the following composition in mole percent (that is, mole fraction multiplied by 100). 56.0% CO2, 34% H2, 5.4% HCl, 2.4% HF, 2.1% SO2, and 0.1% H2S What would be the partial pressure of each of these gases if the t..
The pKb values for the dibasic base B are pKb1 = 2.1 and pKb2 = 7.8. Calculate the pH at each of the following points in the titration of 50.0 mL of a 0.75 M B(aq) with 0.75 M HCl(aq).
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