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Problem- It takes 251 kJ/mol to eject electrons from a certain metal surface. What is the longest wavelength of light (nm) that can be used to eject electrons from the surface of this metal via the photoelectric effect?
Illustrate structures to prove your rezoning.
You are given 100g agarose (which makes a gel when dissovled in boiling water) and 100 ml buffer. Show how you would prepare 50 ml of a 1.2% agarose gel. weight and volume do not add up
what are the kinds of attractive forces that might bind congo red to cotton
How many grams of (NH4)2SO4 should be present to prevent precipitation of Mg(OH)2 (s). The Ksp of Mg(OH)2 is 1.8x10^-11.
what is the half life for this reaction B) how long will it take for the concentration of SO2Cl2 to decrease to 25 percent of its initial concentration C) if the inital concentration of SO2Cl2 is 1.00 M
a gas has a volume of 25 ml when its pressure .056 atm what will the volume of the gas be at the pressure of 1.00 ?
3agno3 na3po4 --gt ag3po4 3nano3silver nitrate and sodium phosphate are reacted in equal amounts of 200. g each. how
The aqueous solubility of CO2 at 20 degrees Celsius and 1.00 atm is equivalent to 87.8 mL of CO2(g), measured at STP, per 100 mL of water. What is the Molarity of CO2, in water, that is at 20 degrees Celsius and saturated with air at 1.00 atm. The..
If Sodium hydroxoide has a H+ of 4.2 x 10^ -10, then what is its OH- , pH, and pOH? If hydrochloric acid has a pOH of 11.5, then what is its pH, OH-, and H+? If potasssium hydroxoide has a pH of 2.5, then what is its H+, OH-, and pH?
Solubility in water in hexane, when mixed water and ether(diethyl ehter), why two layers will form ? Which layer will be top layer why?
how many grams of oxygen gas are required to produce 7.68 kj of heat when hydrogen gas burns at constant pressure to
you have a 5.68 g sample of a compound with the formula xcl2 where x is a metal cation. when the sample is treated with
when a current of 308 mA is used for 8h, what volume of fluorine gas at 298 K and 1 atm can be produced from a molten mixture of potassium and hydrogen fluoride
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