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An electron is ejected from a metal with a velocity 7.78 x10^5 m/s. If the metal has a threshold frequency of 9.90 x1014 Hz, what was the wavelength of the incident photon?
The d-d transition in [Ti(H2O)6]+3(aq) produces an absorption maximum at 500 nm. What is the magnitude of ? for this complex in kJ/mol? HINT: E = h ? and c = ? ? Enter your answer using 3 significant figures.
In a particular solution, [Cr3+]=3.9x10-4 mol/L. What is the minimum pH at which Cr(OH)3(s) will precipitate from this solution. Assume the temperature is 25oC. For Cr(OH)3(s)
Propose a hypothesis for why this allele has not been eliminated by natural selection.
Problem- Part 1) What mass of potassium hydrogen phthalate, KHP is needed to neutralize 40.00mL of 0.100 m NaOH. Part 2) What is the pH of the mixure if 10.00mL of 0.100 M NaOH is added to a 20.00mL, 0.10 M ascorbic acid solution
If a minimum energy of 2.00x10^5 J/mol is needed for this process, what is the minimum energy needed from each photon? B. Calculate the wavelength of light necessary to provide photons of this energy
25.4 g of I2 and 14.2 g of Cl2 are made to react completely to yield a mixture of ICl and ICl3 . Calculate mole of ICl and ICl3 formed.
Determine the ratio of HCO3- to H2CO3 in the patient's blood at this pH. Next, consider a normal blood pH of 7.4. How does this ratio compared to the ratio of HCO3- to H2CO3 in normal blood
Find the heat transferred (in kJ) when 5.50 L of ethylene glycol (d = 1.11 g/mL, see Table 6.2 for c) in a car radiator cools from 37.7°C to 23.0°C.
Problem- To monitor the breathing of a hospital patient, a thin belt is girded around the patient's chest. The belt is a 300-turn coil. When the patient inhales, the area encircled by the coil increases by 50.0 cm2. The magnitude of Earth's magnet..
calculate the amount of the impure sample one should weigh out on the analytical balance in order to titrate 25.00 mL of a 0.1000M solution of NaOH. Use dimensional analysis.
The system is being designed with 18 Solec modules. Two parallel-series arrays of 9 modules in each. Design wiring from the two arrays consider both cases: combine wires into one set with high current or run two sets of wires with lower current: 50..
What types of isomerism are exhibited by the coordination complex. choose as many as needed from the list. A) [Cr(dppe)(NH3)2Br2] B) [Cr(ox)2(H2O)2]- C) PtBr2(PPh3)2
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