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The π electrons in benzene can be approximated as particles ona ring. Calculate the diameter of this "electron ring" if it is assumed that a transitionoccurring at 260.0 nm corresponds to an electron going from n = 3 to n = 4. Compare thisdiameter to the diameter of a benzene molecule, if you approximate the carbonhexagon with a circle.
For the average person, a LDL chlesterol value is less than 200mg/dL. (200mg of LDL cholesterol per dL of blood) What is this value in g/mL
Deduce the numerical value of x in the formula Mo(CO)x. Explain the rationale for your chosen value of x.
What is the value of Ecell for a concentration cell that combines silver electrodes in contact with 0.10 M silver nitrate and 0.00003 M silver nitrate solutions? ( E = + 0.80 V for Ag/Ag+)
A reaction that is used to propel rockets is N2O4(l) + 2N2H4(l) --> 3N2(g) + 4H2O(g). This reaction has the advantage that neither product is toxic, so no dangerous pollution is released.
Using a liquid sample of Na that has a molar heat of fusion of 2.06 kj/mol calculate the number of moles in a liquid sample of Na if sample releases 41.4 kj when it freezes?
Suppose you want to cook pasta in boiling, salty water. What is effect of salt (NaCl) addition to water on the boiling point temperature of the resulting solution?
It is often possible to change a hydrate into an anhydrous compound by heating it to drive off the water (dehydration). A 46.06 gram sample of a hydrate of MnSO4
determine the mass of the lead in grams if the water level in a graduated cylinder initially at 224 ml rises to 274 ml
The density of platinum metal is 21,450 kg/m3. Find the weight in pounds of a cube of platinum that measures exactly 1 inch on each side.
a flask contains 0.180 mol of liquid bromine br2. determine the number of bromine molecules present in the
A 0.9157g mixtureof CaBr2 and NaBr is dissolved in water and AgNO3 is added to the solution to form AgBr Precipitate. If the mass of the precipitate is 1.6930g, what is the percent by mass of NaBr in the original mixture
Calculate w (in kJ) when 265 g iron (III) oxide (MM = 159.7 g/mol) reacts with excess carbon to produce carbon dioxide gas at 358 K
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