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Explain what is the minimum pressure in kPa that must be applied at 25 C to acquire pure water by reverse osmosis from water that is 0.176 M in sodium chloride as well as 0.031 M in zinc sulfate? Presume complete dissociation of electrolytes.
Metallic tungsten is gain by displacement of tungsten from tungsten (VI) oxide by hydrogen at high temperatures. Explain what volume of H2 (measured at 0.975atm and 25oC) is necessary to react with 46.4g of WO3
How large would the lattice energy need to be for the formation of NaCL2 to be exothermic. b. If we were to estimate the lattice energy of NaCl2 to be roughly equal to that of MgCl2
A researcher studying the nutritional value of a new candy places a 4.20-gram sample of the candy inside a bomb calorimeter and combusts it in excess oxygen. The observed temperature increase is 2.71 °C
if nh32.0m h20.0013m and n2 0.033m then determine in which direction will the reaction proceed to reach equilibrium?
Write a balanced (a) molecular, (b) overall ionic, and (c) net ionic equation for the reaction between an aqueous solution of phosphoric acid, H3PO4 (aq) , and an aqueous solution of sodium hydroxide. The products are sodium phosphate and water
Compute the density of dry air and molar mass at zero degree Celsius temperature and 1.0 atm of pressure.
During a titration, a student used 31.92 ml of a .1000 M NaOH (aq) to neutralize 30.0 ml of a . 2488 M oxalic acid solution. a. Write the balanced equation for the neutralization reaction ( you need the formula of oxalic acid)!
Assuming air is made up of 20% oxygen gas and 80% nitrogen gas, what molecules form when air is heated to 20,000K
Choose the answer which gives the electron-domain geometry and molecular geometry which are both correct for TeF4.
Solid Ba(MNO4)2 is in equilibrium in a solution of KMNO4. What concentration of KMNO4 is needed to establish a concentration of 2.0 x 10-8 for the Ba 2+ ion in solution?
Three solutions are mixed together to form a single solution. One contains 0.2 mole AgC2H3O2, the second, contains 0.4 mol Na2S, and the third contains 0.1 mol NH4Cl. What is the net ionic equation
Use a table of Ka or Kb values to determine whether Kc for the following reaction is less than, equal to or greater than 1 CH3CO2- + HSO4- CH3CO2H + SO42-
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