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what is happening to the observed cell potential, Ecell and E0Cell as Zn2+ increases and Cu2+ decreases?
A ruby laser produces radiation of wavelength 633 nm in pulses with a duration of 1.00*10^-9s. If the laser produces 0.475 J of energy per pulse, how many photons are produced in each pulse?
Find the mass in grams of PbCl2 in the products. In a test tube you have 1.0 mL of 0.10 M of NaCl mixed with 1.0 mL of 0.10M of NaCl. 2 NaCl + Pb(NO3)2 --> PbCl2 + 2 NaNO3
If hydrogen gas is collected over water at 20°C and 763 mm Hg, what is the partial pressure of the H2? The vapor pressure of water at 20°C is 17.5 mm Hg.
A gas mixture composed of helium and argon has a density of 0.727g/L at a 755mmHg and 298K .What is the composition of the mixture by volume?
If you wanted to prepare a 1.45 L buffer with a total phosphate concentration of 0.0500 M, how many grams of NaH2PO4 and Na2HPO4 would you mix together? How many grams of conjugate acid do you need? How many grams of conjugate base do you need?
A gas evolved during the fermentation of sugar was collected at 22.5 degrees celsuis and 702 mmHg. After purification its volume was found to be 25.0 L. How many moles of gas were collected?
What is the percent yield of CaO in the reaction CaCO3 yield CaO + CO2 if 5.33 g of CaO are obtained when 10.0 g of CaCO3 are used?
What observed rotation is expected when a 1.02 M solution of (R)-2-butanol is mixed with an equal volume of a 0.510 M solution of racemic 2-butanol
A sample of nitrogen gas is contained in a piston with a freely moving cylinder. At 0 C,the volume of the gas is 361 mL. To what temperature must the gas be heated to occupy a volume of 492 mL.
What final temperature, in degrees celcius, is needed to change the volume of the gas to each of the following, if n and P do not change?
Need to make an aqueous solution of 0.233 M potassium iodide for an experiment in lab, using a 250 mL volumetric flask. How much solid potassium iodide should you add?
Calculate the energy of the photons and determine which principal quantum levels the transition might come from.
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