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The smallest observed frequency for a transition between states of an electron in a one dimensional box is 3.5 x 10 (14) s -1. What is the lenght of the box?
The mixture was analyzed spectrophotometrically and found to be 1.84*10^-3 M in I3-. Calculate the molarity of I3- in the original sample
the reaction between trans-2butene+potassium tert-butoxide+CHCl3 produces which: meso compund or pair of enantiomers. Explain
a gas cylinder containing 6.38 mol of neon has a pressure of 491 mm hg at 295 k. if 3.22 mol of helium is added to this
What is the emf of this cell when [Ni2+]= 3.00 M and [Zn2+]= 0.100 M ? What is the emf of the cell when [Ni2+]= 0.190 and [Zn2+]= 0.820?
a 4.50-g sample of licl at 25.0 degc dissolves in 25.0 ml of water also at 25.0 degc . the final equilibrium
If a 10.0 g sample of platinum metal has a volume of 4.67 mL, what is the density of platinum in g/cm3
Iron (III) oxide may be reduced to pure iron either with carbon monoxide or with coke (pure carbon). Suppose that 150kg of ferric oxide are available
A polyamide was prepared by bulk polymerization of hexamethylene diamine (9.22 g) with adipic acid (11.68 g) at 280 degrees C. Analysis of the whole reaction product showed that it contained 2.6 x 10-3 mol of carboxylic acid groups.
What wavelength lambda should the astrophysicist look for to detect a transition of an electron from the n= 7 to the n=3 level
Calculate the mass of propylene glycol that must be added to 0.360 of water to reduce the vapor pressure by 2.88 torr at 40°C (Pressure of H2O is 55.3 torr at 40°C ).
Write a balanced equation for the acid-base reaction that occurs when each of the following substances is dissolved in water. Explain why you chose the reaction that you did. Write the expression for K for each reaction. Explain whether K is a Ka ..
I understand the rules for significant figures with multiplication/division, and adding/subtracting. But I am unsure of what to do when there is both multiplication and/or division, and adding and/or subtracting in the same question?
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