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Suppose 6 atoms of oxygen are present at the beginning of a chemical reaction. How many oxygen atoms are present when the reaction is over?
what is the least amount of energy that can be emitted by an excited electron in a hydrogen atom falling from an excited state directly to the n=3 state? what is the quantum number n for the excited state
Determining System Equilibrium, A one-litre cylinder at 458'C is found to contain 0.36 moles of HI (g), 0.15 moles of I 2(g), and 0.18 moles of H2(g). Is this system at equilibrium?
1) the initial pH is 11.9 2)the volume of added acid required to reach the equivalence point is 30.3 3)the pH at 5.0 mL of added acid is 11.35 4) the pH at the equivalence point. 5) the pH after adding 6.0 mL of acid beyond the equivalence point
the assumption that the entropies of deprotonation of the ground and excited state 2-naphthol molecules are equal.
Explain why the acetyl group can be selectively removed in the presence of the sulfonamide group
To make sure that the white powder was all sodium chloride and not mixed with sodium hydrogen carbonate, would you need to add a little less or a little more hydrochloric acid to the reaction
The concentration which remains after 20 minutes is 80 mg/L. Determine the reaction order and the rate constant (with appropriate units).
Write the Complete Ionic Equation for the reaction between Magnesium Nitrate and Potassium Hydroxide
The lattice energies of FeCl3, FeCl2, and Fe2O3 are (in no particular order) -2631 kJ/mol, -5339 kJ/mol, and -14,774 kJ/mol. Match the appropriate formula to each lattice energy.
The enthalpy of combustion of n-Butanol, and the enthalpies of formation of CO2(g) and H2O(l), are shown below. Use the information given to calculate the enthalpy of formation of n-Butanol
The analysis of this compound shows that it contains 41.8 percent C, 4.7 percent H, 37.3 percent O, and 16.3 percent N. Calculate the molecular formula of the compound.
What happens to the absorbance at the analytical wavelength for P of the mixture as the reaction progresses?
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