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A gas mixture contains 4.8 g of N2, 7.4 g of H2, and 6.6 g of CH4. What is the mole fraction of H2 in the mixture?
A saturated solution was formed when 5.51×10-2 of argon, at a pressure of 1.0 and temperature of 25 , was dissolved in 1.0 of water. Calculate Henerys law constant of Argon
A saturated solution of magnesium fluoride was prepared by dissolving solid MgF2 in water. The concentration of Mg2+ ion in the solution was found to be 1.18 *10^-3 M. Calculate Ksp for MgF2. Express your answer numerically.
1.a pepsin of 3 grams get dissolved in water and formed a solution of 10.00 ml it was found that the osmotic pressure
Compare your predicted bond lengths and angles, and those predicted by the program, to the actual measured values in the given table. Which modeling system gave better results. Explain any differences and limitations to the method you used for pre..
Construct flow diagrams to show how to separate each of the following pairs of water-insoluble compounds
A buffer is to be prepared by adding solid sodium acetate to 0.10 M CH3COOH. Which of the following concentrations of sodium acetate will produce the most effective buffer
A chemical is placed in a beaker containing 20g of soil and 500 ml water. at equilibrium, the chemical is found in the soil at a concentration of 100mg/kg of soil. the equilibrium concentration of this same chemical in the water is 250µg/L.
a gas cylinder holds 0.330mol of o2 at 150c and a pressure of 3.30atm. the gas expands adiabatically until the volume
consider the following reaction, equilibrium concentrations and equilibrium constant at a particular temperature. determine the equilibrium concentration of NO2 (g)
Calculate the standard enthalpy of the reaction, Delta(H) rxn}, for the thermite reaction: 2Al(s) + Fe2O3(s) ----> 2Fe(s) + Al2O3(s) Elements in their standard state have an enthalpy of formation value of zero
When a 2.3L sample of hydrogen gas at 25oC is heated to 120oC at constant pressure, what is the new volume of the gas?
Assuming that the calorimeter absorbs only a negligible quantity of heat and that the density of the final solution is 1.0 g/mL, calculate the enthalpy change per mole of BaSO4 formed.
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