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Question
UV light with a wavelength of 254 nm can be used to reduce nitrate ions in water to nitrite ions. What are:
The frequency of light at this wavelength?
The energy of a photon at this wavelength?
A nugget of pure gold of 4.80 grams is absorbed 284 Joules of heat. if the initial temperature was twenty eight degree Celsius then what was the final temperature of the Au? The specific heat of gold = 0.129 J/(g·°C)?
a solution is 0.0010 m in each of the following cations ag hg2 and pb 2. the ksp values for agcl hg2cl2 and pbcl are
What wavelength, of light would be necessary to ionize an electron at the n = 3 state in a He+ cation
Assuming that the atoms are spheres in contact along the face diagonal, what is the radius of a Ar atom (in Angstroms)? An angstrom = 10-10 m or 10-8 cm.
Using the Debye-Hucket equation, calculate the activity coefficients for the acidic and basic forms of bromocresol green, HX- and X2-, for a solution with an ionic strength of u=0.1M.
What is the rate of consumption of O2 in a combustion reaction carried out in a 11.00 L flask if 6.30 mmol of oxygen is consumed in 25.6 s?
What are the stereochemical configurations of the two diastereomers of (2R,4S)-2,4-hexanediol
How would you prepare 500 mL of cyanic acid (HOCN)/sodium cyanate (NaCNO) buffer, with a pH of 4.80? Ka (HCNO)=2.0*10-4
When a metal was exposed to light at a frequency of 3.94× 1015 s-1, electrons were emitted with a kinetic energy of 5.80× 10-19 J. What is the maximum number of electrons that could be ejected from this metal
Explain which element is the central atom, define how many bonds does the central atom form, is it polar or non-polar, define what the direction of negativity is
In a chemical reaction two water-soluble ionic substances react to form an insoluble solid precipitate in a metathesis reaction. Would you expect DS to be positive, negative, or close to zero for this reaction
KHC8H4O4 is dissolved n water and titrated to the equivalence point, with 26.45 mL of NaOH, what is the molar concentration of the NaOH
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