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At an altitude of 30 km, the temperature in the stratosphere is approx. -45.3 degrees F. What is the average kinetic energy of a single CF2Cl2 molecule at this temperature?
Compute the pH if NaOH solution of the 10.00 mL has been mixed. pKa of HCOOH = 3.74
What volume of oxygen, in ml, would be produced at STP (0 degrees C and 1.00atom) by the decomposition of 3.428g of sodium chlorate, according to 2NaClO3(s) -> 2NaCl(s) + 3O2(g)
Estimate the value of the equilibrium constant at 625 {rm K} for each of the following reactions. Delta H{^{circ}_{rm f}} and S{^{circ}} for rm BrCl(g) is 14.6 {rm kJ/mol} and 240.0 frac {rm J}{rm mol cdot K}, respectively.
Concentrated sulfuric acid has a concentration of 18 M. How much concentrated sulfuric acid would be needed to make 255 mL of 1.0 M sulfuric acid?
The heat effect of the neutralization reaction NaOH(aq) + HCl(aq) is measured in an open adiabatic solution calorimeter (not a coffee cup calorimeter) The heat capacity of the calorimeter itself is 456 J/K.
A gas mixture contains helium and oxygen at respective partial pressures of 255 torr and 0.450 atm. What is the total pressure in mm Hg of the mixture?
What molar ratio of sodium acetate to acetic acid (NaAc/HAc) should be used in preparing a buffer having a pH of 4.35? (Ka = 1.8×10-5 for acetic acid.)
Limestone (CaCO3) is decomposed by heating quicklime (CaO) and carbon dioxide. Calculate how many grams of quicklime can be produced from 9.0 kg of limestone.
This leaves the aspartic acid amine group and the side chain carboxylic acid functional group of aspartic acid. Therefore aspartame will have an isoelectric point at a pH between the pKa values of these functional groups
After equilibrium is reached, (X)=.55 M. Calculate the Keq (Kc) for this reaction. show full steps please for rating
A mechanic in an automotive repair shop is exposed to the following carbon monoxide levels over an 8 hour shift.
estimate the ratio of their conductivities at room temperature
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