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Explain what is the frequency of photons emitted by hydrogen atoms as they undergo transitions from n=5 to n=3? If the concentration on the STOCK KMn04 solution is 0.200M, how much of it do you need to make a 250ml diluted solution of 0.0200M?
Sr(OH)2, is considerably more soluble in hot than in cold water. At 25 °C, 1.01 g of this compound dissolves in 0.100 L of water, but 27.9 g dissolves at 100.0 °C. Calculate Ksp at the temperature of 25°C
Find the velocity of an electron emitted by a metal whose threshold frequency is 2.47 x 10^14 s^-1 when it is exposed to visible light of wavelength 5.02 x 10^-7 m
A 1790 g sample of a solution of the solute methanol in the solvent ethanol that has a concentration of 4.50 % by mass CH3OH is available. Calculate the amount (g) of methanol that is present in the sample.
What is the pH at the stoichiometric point? What is the pH when 105% of the base required to reach the stoichiometric point has been added?
How do I find the weight percent of each component in the original mixture and would this affect the outcome if Methanol had been used in place of the dichloromethane? Product weight of Oil: 0.11g & Product weight of Polypropylene Glycol : 0.19g.
For CO2 one of the major absorptions of IR radiation occurs at the wavenumber of 2350cm^-1. what is the energy corresponding to that IR photon
avogadros number is big. if you had 6.02 x 1023 dollars and could spend it at 1 billion 109 per second for your entire
describe the unit cell for potassium flouride, copper(I) flouride, and cadmium flouride. How many atoms of each type are in each unit cell?
When the D line of sodium light impinges an air-diamond interface at an angle of incidence of 30 degrees, the angle of refraction is 11.9 degrees. What is nD for diamond
Derive a frequency response curve for a low-pass RC filter in which R= 2.5 kohms and C = 0.015 F. Cover a range of (Vp)0/(Vp)1 of 0.00I
the chemical reaction for a zinc-oxygen cell iszn c 12o2g h2o l znoh2 cand the thermodynamic properties at 25 oc
Given that 3.582 g of copper (II) chloride are dissolved in 2.478 litres of deionized water, answer the following: 1) How many moles of copper (II) ions are present in the sample
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