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What wavelength corresponds to the transition n=5 to n=3 in the hydrogen atom? What type of radiation is this?
In photography, solutions of sodium thiosulfate are used to dissolve unexposed AgBr (Ksp = 5.0 × 10-13) in the developing process for black-and-white film. What mass of AgBr can dissolve in 1.00 L of 0.238 M Na2S2O3.
what is the molality of ethanol in a solution made by dissolving 14.6g of ethanol, C2H5OH, in 53.6 g of water?
On a hot day a room air conditioner uses 1.0 kW of electrical power and works with a coefficient of performance of 2.9. How much heat does the AC remove from the room in 1 min?
A piece of galena has a volume of 5.4 cm3. If the density of galena is 7.5 g/cm3, what is the mass (in kg) of that piece of galena?
If the decay of trihalomethane is first order,and 90% of the trihalomethanes in glass of tap water are gone after 3 hours, what is the decay rate constant
Discuss in detail, one way in which atomic nuclear decay takes place. What is the significance of atomic nuclear decay? Analyze the societal implications of using this process.
The half-life for a first order reaction at 550 oC is 85 sec. How long it would take for 23% of the reactant to decompose?
a 0.30 m solution of sucrose c12h22o11 at 37oc has approximately the same osmotic pressure as blood. what is the
Which of the following peptides has a pI close to 5.5? Assume that the pKa value of the alpha-amino group is 9.6 and the pKa for the alpha-carboxylate group is 2.3. A. Ser-His-Arg-Asn B. Val-Thr-Gln-Tyr C. Asn-Cys-Ala-Gly D. Arg-Ile-Asn-Arg E. Asp..
Balance the following redox reaction if it occurs in an acidic solution. What are the coefficients in front of H2C204 and H2O in the balanced reaction. MnO4^-(aq)+H2C2O4(aq)--> Mn^2+(aq)+CO2(g)
Benzene has a heat of vaporization of 30.72 kJ/mol and a normal boiling point of 80.1 degrees Celsius. At what temperature does benzene boil when the external pressure is 460 torr
Lead metal can be extracted from a mineral called galena, which contains 86.6% lead mass. A particular ore contains 68.5% galena by mass. If the lead can be extracted with 92.5% efficiency what mass of ore is required to make a lead sphere with a ..
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