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Using appendix C compare entropies at 25 degrees C for the following pairs of substances. For each pair, explain the difference in the entropy values.a.) CuO(s) and Cu2O(s)b.) 1 mol of N2O4(g) amd 2 mol NO2(g)c.) CH3OH(l) and CH3OH(g)d.) 1 mol PbO(s) plus 1 mol CO2(g) and 1 mol PbCO3(s)
Explain why a 1m solution of the compound FeCl2 in water has a lower freezing temperature than a 1m solution of KCl in water and what is the empirical formula
Magnesium oxide decomposes into magnesium and oxygen. If 12.09 of magnesium oxide decomposes to form 7.29 of magnesium, what mass of oxygen gas is also released in the reaction?
Why are some covalent bonds polar and others aren't? Understand why the covalent bonds of water are polar and those in the hydrogen molecule (H2) are non-polar.
The equilibrium constant, Kc, for this reaction is 4.6 x 10^ -3 N2O4(g) 2NO2(g) If the equilibrium contains 0.050 M NO2, what is the [N2O4]
Offer a reasonable explanation to account for the unequal ratio attained (2% of one isomer and 98% of the other isomer) in the reaction of BH3 (and the solvent diglyme) with 2-methyl-2-butene.
PCBs are transported through the environment in the vapor phase to Lake Superior. Let's assume that the flux to this lake is almost all due to rainfall, which has an average PCB concentration of 30 ng/L. The average depth of Lake Superior is 150 m..
The reaction of methane and water is a way to prepare hydrogen according to CH4(g)+H2O=CO2(g)+H2(g) a) If 995 g of CH4 reacts with 2510 g of water, how many moles of reactants and products are there when the reaction is finished
A substance has an extinction coefficient of 5 x 10^5 L cm^-1 mol^-1. A concentrated solution of this substance has an absorbance too high to measure. You dilute 1 ml of this solution to 25 ml with distilled water; the measured absorbance is 0.2.
What small molecule is eliminated during the dehydration reaction when acetaldehyde is heated in the presence of KOH
Ligands approaching in a tetrahedral pattern cause some orbitals to be raised in energy. How many orbitals are on the lower energy level?
the element boron has two naturally occurring isotopes with masses of 10.0129 amu and 11.0093 amu. what is the percent
describe an incident fire spill explosion etc you have experienced or research one on the internet professional journal
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