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Suppose that the microwave radiation has a wavelength of 12.4cm . How many photons are required to heat 235 mL of coffee from 25.0 C to 62.0 C? Assume that the coffee has the same density, 0.997g/mol , and specific heat capacity, 4.184 J?g*K, as water over this temperature range.
Crude oil is a complex solution of liquids, and some gases and solids. The components are commonly separated from each other by utilizing a technique called fractional distillation
A reaction with the activation energy Ea= 166.00 kJ/mol, has a rate constant k = 3.900 x 102 at 329.00 Kelvin. Determine the rate constant when the temperature is changed to 693.00 Kelvin. R = 8.314 J K-1mol-1
The bp of the solution was 104.3C when 40 g was dissolved in 150mL of water. I lose points if I am more than 5% off. Any ideas what the actual substance might have been? Keep in mind this is a college gen chem lab.
Explain why the rates of diffusion of nitrogen gas and carbon monoxide are almost identical at the same temperature.
Explain using the Michaelis-Menten model the reasonsing behind the net effect of an irreversible inhibitor on the enzyme's substrate affinity and rate of product formation?
calculate w for the following reactions that occur at 298k and 1 atm pressure, CO2(g) + NaOH(s) -> NaHCO3(s) and 3O2(g) -> 2O3(g)
determine the net change of oxidation number of each of the elements in the redox equations.
A solution is prepared by mixing 50.0 mL of 0.11 M Pb(NO3)2 with 50.0 mL of 1.3 M KCl. Calculate the concentrations of Pb2+ and Cl - at equilibrium. Ksp for PbCl2(s) is 1.6* 10-5.
show the calculation for the percent yield of K3[Fe(C2O4)3].3H2O using your actual yield and the theoretical yield
how much energy is required to vaporize 48.7 g of CH2Cl2 at its boiling point if its Hvap = 31.6 kg/mol
After careful consideration, the student decides to se the method of recrystallization. What should be the characteristics for a good solvent that the student should consider? Identify them by circling those that apply:
20 ml Calcium Hydroxide solution was titrated with 9.8 ml 0.0105 M HCl in according to reaction: Ca(OH)2 + 2HCl ? CaCl2 + 2H2O What is the Molarity of Ca(OH)2 in the solution
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