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An atom has an electron with energy -9.00E-19 J. It absorbs a photon and moves to a new level with energy -4.00E-19 J. What is the wavelength of the photon in nm?
Ammonia will react with oxygen in the presence of a copper catalyst to form nitrogen and water. From 164.5°C to 179.0°C, the rate constant increases by a factor of 4.27. What is the activation energy of this oxidation reaction?
Calculate the standard free energy change and the equilibrium constant for the following reaction at 25°C: (all aqueous solutions are 1 M) Au(s) + Ca2+ (aq) ? Au3+(aq) + Ca(s)
Consider the titration of 80.0 mL of 0.100 M Ba(OH)2 by 0.400 M HCl. Calculate the pH of the resulting solution after the following volumes of HCl have been added.
Perform a t-test at the 95% confidence level to determine if the new method contains bias. What is the calculated value of t for the new method
Azulene has an appreciable dipole moment. Write resonance structures for azulene that explain this dipole moment and that help explain its aromaticity.
A 2.00L buffer solution is 0.250M in HC2H3O2 and 0.250M in NaC2H3O2. Calculate the pH of the solution after the addition of 0.100 moles of solid NaOH. Assume no volume change upon the addition of base.
The filter is heated to 550 oC, and the filter plus residual then weighs 37.0 g. Another 10.0 L sample of the same water is evaporated, without filtering, yielding a residual mass of 40.0 g.
calculate the force and the pressure exerted on the wal given that the area of the wall is 100 cm squared and the speed of the atoms is 600m/s
a sample of nitrogen gas is collected over water at a temperature of 23.0 degrees celcius. what is the pressure of the
Three gases were added to the same 8.5 L container. The total pressure of the gases was 791 torr at room temperature (25.0°C). If the mixture contained 0.71 g of oxygen gas, 0.85 g of carbon dioxide, and an unknown amount of nitrogen gas, determin..
A paint company mixes it's paint with water to create more paint per gallon. They currently have ten gallon jugs which contain 10% water.
What is the theoretical yield of AgCl if 30.2 mL of 0.1000 M AgNO3 reacts with an excess of 0.1000 M HCl
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