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State is the Lewis electron dot structure for SeO2? O--Se--O with one of the oxygens double bonded to Se as well as 6 electrons around the single bonded O and 4 electrons around the double bonded O and 2 electrons on Se. what is the right structure?
calculate the specific heat capacity of a sample liquid if this 100 g sample of an unknown liquid absorbs 2000 j of
54g of a certain metal at 98 degree Celsius was placed into 80ml of water at 297K. Assuming no heat is lost to the surrounding, what is the temperature of the water and the metal
Calculate the vapor pressure of a solution of 20 g of benzene (C6H6) and 20 g of toluene (C7H8) at 90 oC
Determine the mass of H 2 O is formed if oxygen of 10.0L react completely in the given equation?
An amount of 0.500 grams of NH4Cl was added to 50.0 mL of the solution in Problem 1 above. Use the Keq calculated from problem 1 to calculate the pH of this solution.
If 5.0L of nitrogen at 12 degrees Celsius and 1.30 atm pressure reacts with the same volume of hydrogen at the same temperature and pressure, what volume of ammonia is obtained at that temperature and pressure
Calculate the mass of nitrogen dissolved at room temperature in an 83.0 {rm L} home aquarium. Assume a total pressure of 1.0 {rm atm} and a mole fraction for nitrogen of 0.78.
How many grams of oxygen (O2) are needed to completely react with 2.40 g of propane (C3H8) according to the equation below?
Calculate the pH during the titration of 40 mL of 0.1M HCL with 0.1M NaOH solution after the following additions of base:
A scientist wants to make a solution of tribasic sodium phosphate, Na3PO4 , for a laboratory experiment. How many grams of Na3PO4 will be needed to produce 425 ml of a solution that has a concentration of Na^+ ions of 1.40 M
A piston exerting a pressure of 1.00 atm rests on the surface of water at 25 degrees C. The pressure is reduced reversibly such that 10.0 g of water evaporated and adsorbed 22.2 kJ of heat. Calculate w, q, change in U and change in H.
Use a spreadsheet to calculate the composition of dry air at 5400K and 1 bar. Take the initial composition as .78 mol N2, .21 mol O2 and .01 mol Ar. Neglect the ionization of NO.
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