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what is the value of Kc for the following reaction at equilibrium: N2(g) + 3H2(g)<>2NH3(g) if [NH3]=2.2 M, [N2]=.44 M, and [H2]=.40 M
Calculate the change in pH when 7.00 mL of 0.100 M HCl(aq) is added to 100.0 mL of a buffer solution that is 0.100 M in NH3(aq) and 0.100 M in NH4Cl(aq).
Calculate and indicate values of nonzero formal charges. Based on formal charges, circle the preferred structure.
Determine the mass of Cr 3 + in the original solution if The total mass of the precipitate = 49.6 .
When the following equation is balanced using the smallest possible integers, what is the exponent of N2O in the reaction quotient expression?
For many reactions near room temperature, the rate and the rate constant approximately double for a 10 °C rise in temperature. What is the value of activation energy in kJ/mol for such a reaction?
A room of volume of 2 cubic meters is initially at 19 C and 101 kPa. A block of dry ice (solid carbon dioxide) is dropped into the room and then the room is sealed (air tight)
From this statement alone, can you conclude that the solution is acidic? If not, what additional information would you need
What is the molarity of calcium hydroxide solution if the titration requires 74.70 ml of the acid to reach the endpoint?
A gas mixture with a total pressure of 765 contains each of the following gases at the indicated partial pressures: , 118 ; , 229 ; and , 187 . The mixture also contains helium gas. What is the partial pressure of helium gas.
Using the ideas regarding the effect of basic anions on salt solubility. Which order is correct for the solubility and the Ksp.
Octane has a vapor pressure of 40. torr at 45.1 degrees celcius and 400. torr at 104.0 degrees celcius. What is its heat of vaporization (R=8.214 J/K mol)
Calculate the k value associated with the reaction at 25 degrees celcius given the Gibbs free energy of formation of N2H4 is -419.15Kj/mol
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