For a diatomic gas phase molecule, the rotational energy is given by the expression:
Ej = Be J(J+1)
where J is the rotational quantum number, and Be is the rotational constant. The degeneracy for rotational states is given by:
g(J) = 2J+1
The normalization constant (total rotational partition function) for the Boltmann distribution for rotations is given by:
Q(J,T) = kBT / Be
Iodine, I2(g), has a rotational constant of Be = 0.037372 cm-1. Determine the fraction of I2 molecules in the J= 25 state at T=300.0K.
(1 J/mol = 0.083595 cm-1).
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draw out the mechanism for synthesis Butyl acetate including a transition state
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Suppose that in the synthesis of benzoic acid , a student uses 1.09 grams of magnesium , 7.83 grams of bromobenzene , and 21.196 grams of dry ice. If the mass of benzoic acid obtained were 4.13, what was the percent yield?
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a) Calculate the pH of a 0.015M solution of formic acid, HCO2H?
Ka, HCO2H=1.8x10^-4 HCO2H(aq)-->HCO2^-(aq)+H^+(aq)
b) What is the concentration of HCO2H at equilibrium?
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Compute the root-mean-square speed of Nemolecules in a
sample of neongas at a temperature
of 71°C.
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a. Briefly describe what a commutator is using words and an equation. How do commutators relate to the uncertainty principle?
b. Use the angular momentum commutators to show why we can not simultaneously determine the z-component of angular momentum and the x and/or y components.
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A cylinder with a moveable piston contains 0.553 mol of gas and has a volume of 256 mL .
What will its volume be if an additional 0.246 mol of gas is added to the cylinder? (Assume constant temperature and pressure.)
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Find the pH of each of the following mixtures of acids.
1.5×10−2 molL−1 in HBr and 1.0×10−2 molL−1 in HClO4
8.5×10−2 molL−1 in HF and 0.220 molL−1 in C6H5OH
0.110 molL−1 in formic acid and 5.5×10−2 molL−1 in hypochlorous acid
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what is the relative activity and the degree of inhibition caused by a competitive inhibitor when [S]=km and [I]= ki?
please show the work
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A 25.0 mL sample containing Ni2+ was analyzed and gave an instrument siganl of 23.6 units (corrected for a blank). When exactly 0.500 mL of 0.0287 Ni(NO3)2 was added to the solution, the signal increased to 37.9 units. Calculate the molar concentration of Ni2+ assuming that the signal was directly proportional to the analyte concentration.
I was told this was a single addition standard addition problem, but I'm not sure how to work it. Thanks!
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A 10.0 mL solution of 0.064 M AgNO3 was titrated with 0.032 M NaBr in the cell.
S.C.E. || titration solution | Ag(s)
Find the cell voltage for 0.5, 14.0, 20.0, and 32.0 mL of titrant. (The Ksp of AgBr = 5.0 ✕ 10−13.)
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21) Phosphorus pentachloride decomposes according to the chemical equation. A 0.237 mol sample of PCl5(g) is injected into an empty 3.70 L reaction vessel held at 250
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if you begin with 3.46 g of Fe, what mass in grams of O2 is required for complete reaction?
what is the theoretical yield of FeO3 in grams?
if 4.83 g of Fe2O3 are actually obtains, wht is the percent yield?
In: Chemistry