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1. What is the percent composition of all the elements in the compound ammonium dihydrogen phosphate? 2.What is the mass of phosphorus (in pounds) in a 25.0 lb quantity of sodium phosphate?
a gas was acquired by boiling liquid nitrogen that was stored in a 180.0 l tank. determine what volume of n2 is
Given that benzaldehyde is a meta- director, draw all three resonance structures for the carbocation intermediate that results from STEP 2 in the electrophilic aromatic substitution reaction when benzaldehyde reacts
During a quirky promotion by a discount sporting goods store, golf balls were given away free when purchasing Ping-Pong balls in bulk. An equal mass of golf balls was given away based on the mass of ping
C6H5NH3Cl is a cation chloride salt with acid. If 37.1 g of C6H5NH3Cl are dissolved in water to prepare a 150 mL solution, which is the initial molarity of the cation?
Sunlight causes the following reaction to take place in the atmosphere: NO2(g) NO(g) + O(g). Calculate the standard enthalpy of the reaction from the following information and from additional information in Appendix 2A
The solution becomes quite warm, but after it is allowed to return to room temperature, water is added to total 500 mL of solution. Calculate the pH of the final solution. Report pH to 2 decimal places.
The energy of electron-in-a 1 m box is given as (h^2*n^2)/(8mL^2). find the transition energy form n=3 to n=2. The mass of electron is 9.109e-31 kg and planck constant 6.626e-34 Js
Determine the stiochiometric coefficients for the reaction, (3CaO Al2O3 3SiO2) + a(CaO Al2O3 SiO2)= b(CaO Al2O3 2SiO2) + c(2CaO Al2O3 SiO2)
The osmotic pressure,pie , of a solution of glucose is 83.1atm . Find the molarity of the solution at 298k .
Which is predicted to be the most ionic substance? a) NiS b) CuI c) CoO d) NaBr
Calibration of a glass electrode gave a reading of 148.7 mV with 0.05 m potassium dihydrogen citrate buffer standard (pH = 3.766) and a reading of -167.4 mV with 0.01 m borax buffer standard (pH = 9.139), both measured at 30°C.
K for the system A(g) + B(g) 2C (g) is 4.0. In how many of the following experiments will equilibrium be realized through a net reaction forming C from A and B
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