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How many MOLES of phosphorus triiodide are present in 7.73E+22 molecules of this compound
write a report about the chemical equation about the combusiton of butane. the report must include the equation, a brief history about the combustion of butane and its importance to the world and any dangers involved.
evaluate its purity and to determine whether it might be identical to a given sample of an illegal drug, a white crystalline solid. Clearly explain what you would do, why you would do it, and how you interpret your results
You need to produce a buffer solution that has a pH of 5.38. You already have a solution that contains 10. mmol (millimoles) of acetic acid.
Calculate the pH of Benzoic acid if 0.0458 M is dissolved in water ( Ka = 6.40 x 10^-5) C6H5CO2H + H2O = (H3O+) + C6H5CO2 ^-1
what mass of limestone is required to remove all the sulfur dioxide formed by the combustion of 7.2 104 kg of coal that is 0.33 mass % sulfur?
Study of a first-order reaction, In the study of a first-order reaction, A--->B, it is found that A/Ao=0.125 after one hour. The system initially consisted of 0.20 mole of a gaseous A at 25 degrees C and 1 atm
A gas occupying a volume of 695 mL at a pressure of 0.970 atm is allowed to expand at constant temperature until its pressure reaches 0.541 atm. What is its final volume?
Determine number of moles of oxygen molecules are in the cylinder and compute the mass of solid C 2 H 3 NaO 2 required mixing with 60.0mL of .125M C 2 H 4 O 2 to form a ph 4.20 buffer?
The Solubility of calcium arsenate, Ca3(AsO4)2 is 3.63 milligrams per 100mL. What would you expect the solubility product (Ksp) to be
A mechanic in an automotive repair shop is exposed to the following carbon monoxide levels over an 8 hour shift.
Compute the change in temperature when 2 g of sodium chloride is dissolved in 270.0 mL of water initially at 25 C. The heat capacity of water is 4.184 J/mL/K. Neglect the heat capacity of the NaCl.
at 25 C, a sample of NH3(molar mass= 17g/mol) effuses at a rate of .050 mole per min. under the same conditions, which of the fallowing gases effuses at approximately one-half that rate
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