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a ballon filled with 0.505 mol of gas contracts reversibly from 1.0 L to 0.10 L at a constant temperature of 5.0 degree celsius. In doing so it loses 1270 J of heat. calculate w, q, and U for the pr
Calculate the wavelength of each of the following frequencies of electromagnetic radiation. 1105 kHz (typical frequency for AM radio broadcasting)
When 2.00 g of hydrazine decomposed under constant-pressure conditions, 7.00 kJ of heat were transferred to the surroundings. What is delta H for the following reaction? 3 N2H4(l) --> 4 NH3(g) +
What is the internal energy (U) change of a system that emits 358 J of heat and receives 412 J of work
if the transition state has a smaller volume than the reactants (deltaV double dagger < 0) does the effectice rate constant of the reactant increase or decrease when the pressure is increased
Calculate the pH at 25 degrees C of a 0.25-M aqueous solution of oxalic acid (H2C2O4). (Ka1 and Ka2 for oxalic acid are 6.5 x 10^-2 and 6.1 x 10^-5, respectively.)
Cyclopropane has significantly less angle strain than cyclopropane, yet is only slightly lower in energy. How can this be true? How does this information relate to the fact that cyclobutane is not a
Determine the percent ionization of the following solutions of formic acid at 25 degrees centigrade (C) : a) 0.016 M, b) 5.7 X 10^-4, c)1.75 M
When 2.00 g of hydrazine (N2H4) decomposed under constant-pressure conditions, 7.00 kJ of heat were transferred to the surroundings. What is pH for the following reaction? 3 N2H4(l) --> 4 NH3(g)
out of the options of sn2 substitution, e2 elimination, sn1, e1 how can you determine which reaction it will be given a reagant
In biological and medical applications, it is often necessary to study the autoionization of water at 37 degrees centigrade instead of 25 degrees centigrade. given that Kw for water is 2.5 X 10^-14
The acid-dissociation constant for hypochlorous acid (HClO) is 3.0 X 10-8 . Calculate the concentrations of H3O+, ClO-, and HClO at equilibrium if the initial concentration of HClO is 0.0090 M.
Provide a synthesis of butane-2,3-diol from 1 or 2 carbon alkanes. Use any reagents. Show the steps and the products formed for each step.
NaCl is an electrolyte that commonly used to melt ice by lowering its melting point. what is the lowest possible melting point for ice that could be obtained considering the solubility of NaCl in wa
How much heat is absorbed by a copper penny with mass 3.10 g whose temperature rises from -8.0*C to 37.0*C
If Delta H = -60.0 kJ and Delta S = -0.200 kJ/K, the reaction is spontaneous below a certain temperature. Calculate that temperature
Balance the following full redox reactions using the lowest integer coefficients, in basic conditions. NiO2(s) + Zn(s) ? Ni(OH)2(s) + ZnO22?(aq)
Balance the following chemical reaction using the lowest integer coefficients, in acidic conditions I?(aq) + BrO3?(aq) ? HIO(aq) + Br?(aq)
What would be more stable, 1,1-dimethylcyclopropane or cis-1,2-dimethylcyclopropane or trans- 1,2-dimethylcyclopropane
At 80C the vapor pressures of pure liquids X, Y, and Z are 385, 190, and 66 mmHg respectively. what pressure must be exerted on the surface of a solution containing one mole of X, three moles of Y,
A fossil is found to have a 14C level of 75.0% compared to living organisms. How old is the fossil
What would the molecular orbital diagram for a compound made of equal portions of aluminum and phosphorous look like
Calculate the amount of isopentyl acetate that should be present in the reaction mixture at equilibrium based on 300 mmol of acetic acid and 150 mmol of isopentyl alcohol as starting quantities. Use
The rate constant for this reaction at 25 degrees C is 4.9 x10-6 L/(mol s) while the rate constant at 35 degrees Cis 1.5 x 10-5 L/(mol s). Use this data to calculate the energy of activation for thi