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The work function for mercury is equivalent to 435 kj/mol photons. When light of 205nm strikes a mercury surface,the kinetic energy is 2.47x10^-19 J/photon. What is the velocity of the ejected electrons in m/s?
Hydrogen gas is contained in a one-liter vessel at "STP"(0 degrees Celsius and 1 Std. Atm.). Flourine gas is contained in a second one-liter vessel at the same conditions of temperature and pressure.
Calculate the energy (joules) required to achieve the transition from the ground state to the first excited state for this system.
The determination of iron in industrial waste stream is often carried out by reacting the water sample with o-phenanthroline to form a red-orange complex that absorbs at 510 nm.
A 32.0-g sample of water at 290. K is mixed with 51.0 g water at 320. K. Calculate the final temperature of the mixture assuming no heat loss to the surroundings.
what is the mass in grams of solid sulfur,S8 required to produce 25.50g of Cu2S(s) according to the balanced equation.
When silver crystallizes, it forms face-centered cubic cells. The unit cell edge length is 408.7 pm. Calculate the density of silver. (Enter answer to three significant figures.)
What is the boiling point of a solution made using 813g of sucrose, C12H22O11, in 0.275 kg of water,H2O.
What is the percent ionization of a 0.186 M solution of this acid? A certain weak base has a Kb of 7.50 × 10-7. What concentration of this base will produce a pH of 10.06?
Critical constants of a gas with van der Waals parameters, Estimate the critical constants of a gas with van der Waals parameters
Compute the mass of salt required to bring the freezing point of 200 mL of H 2 O from 0 degrees C to -5 degrees C.
If a piece of Calcite (Calcium Carbonate) is put into the lake, would it tend to dissolve? Calcium carbonate solubility is 10^-8.35 M2, and the measured concentration of calcium ion is 0.1mM (millimolar)
A chemistry student prepares acetone by decomposing 12.3 g of calcium acetate. If the student collected 2.50 g of acetone and the theoretical yield is 3.42 g.
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