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An electron in a hydrogen atom goes through a change in energy level from n=4 to n=2 calculate the wavelength of the photon? Assume wavelength =470nm calculate the energy photon?
A 12.0 g sample of solic NH4Cl is heated in a 5.00 L container to a high temperature. At equilibrium, the pressure of NH3 (g) is 1.22 atm. What is the value of Kp for the reaction
Write the three standard reductions of fresnium, copper, and joaquium in the format of a standard reduction potential table. What is the strongest oxidizing agent and the strongest reducing agent of the three
What was his wavelength at his average speed, if he weighed 207 lbs at the time of the race?
A substance composed of which of the following molecules will have stronger intermolecular forces. CO2 or NO2
At what temperature will He atoms have the same Crms value as N2 molecules at 25 degrees Celsius. Solve this problem without calculating the value of Crms for N2. Crms is the root mean square speed.
how efficient is the extraction of tea leaves containing 1.0g of caffeine with two 30mL portions of chloroform over that of a single-step extraction? KD= 8.36 at 25 C)
What polypeptide would be synthesized from the following template strand of DNA:3' CGG AGA CGG ACG 5'
What is the percent by mass of oxygen in a gaseous mixture whose molar composition is 0.500% CO2 and 99.500% air. The composition of air is 21% mole O2, 79% mole N2, and has an average molar mass of 29.0 g/mol.
Draw a structure of the species that is formed at the lower PH if the acid proton adds to the azo nitrogen atom adjacent to the aromaic ring containing the SO3- group. Why does the proton adds to this particular nitrogen when two other nitrogen at..
For a particular reaction, Delta H = -30kJ and Delta S = -92J/K . Assume that Delta H and Delta S do not vary with temperature. Part A. At what temperature will the reaction have Delta G = 0
Given the following heat capacities, (assume they are constant over the temperature range in consideration here), calcrulate enthalpy for the reaction 2NO + O2 ->2NO2 at 398k.
if 10.3 mL of 0.100 N NaOH is used to bring 10.0 mL of juice to a pH of 8.20, what is the Titratable Acidity (g/L) assuming tartaric acid is 7.50 eq/L
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