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Determine the entropy change for heating nitrogen gas from 25 oC to 100oC under the following conditions.Cp =29.1J·K?1 ·mol?1.a) Constant pressureb) Constant volumec) Why are they different?
Phosphoric acid, H3PO4, is a triprotic acid, for which Ka1=7.2 x 10-3, Ka2 = 6.3 x 10-8 and Ka3 = 4.2x 10-13. What is the value of Kb for hydrogen phosphate anion, HPO4 2-?
explain why it is appropriate to group a polyatomic ion in parentheses in a chemical formula, if more than one of that ion is present in the formula.
what is the phase of matter of the solute and solvent of sterling silver?
consider the following reaction, equilibrium concentrations and equilibrium constant at a particular temperature. determine the equilibrium concentration of NO2 (g)
calculated using the energy level equation. A Li2+ ion emitted a photon with a wavelength of 11.4 nm to reach an energy level with n=1. What was the value of n for its initial energy level?
At 2000 degrees celcius the equiblibrium constant for the reaction 2NO to N2 and O2 is Kc = 2.4 x 103. If the initial concentration of NO is 0.200M, what are the equilibrium concentrations of NO, N2, and O?x?
The buffer has a concentration of 150 mMol ( 150 mM of KH2PO4 / 150 mM K2HPO4. The pKa of the drug ephedrine is 9.6. Will the drug have a negative, positive, or neutral?
How many grams of N2 are required to react with 2.30 moles of Mg in the following process?
If only COF2 is present initially at a concentration of 2.00 M , what concentration of COF2 remains at equilibrium? Express the molar expression numerically
At 20 degrees C, the vapor pressure of ethanol is 45 torr and the vapor pressure of methanol is 92 torr. What is the vapor pressure at 20 degrees C of a solution by mixing 27.0 g of methanol and 75.0 g of ethanol?
The nuclide Pb-210 undergoes three successive decays (beta, alpha, and beta, respectively) to form a stable nuclide. What are the three nuclides which form from Pb-210 in this decay series
the pH of a 0.20 M solution of a weak monoprotic acid is 3.70. What is the value of the ionization constant
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