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How many ml of 0.122 M MnO4- are required to react with an excess of C2O4^2- in order to produce 75.25 ml of carbon dioxide gas measured at 30.0 degrees C and 715 torr? MnO4- (aq) + C2O4^2- (aq) -------> MnO2 (s) + CO2 (g) Basic solution
An aqueous solution containing 0.18 M of unknown base has a measured pH equal to 8.27. What is the value of pKb for the unknown base?
Recrystallization from 95% ethanol gave yellow crystals. What is the overall mechanism for this reaction including all arrows, the identification of the electrophile and nucleophile, and all charges?
The standard change in Gibbs free energy is deltaG= -32.8kJ/mol. What is deltaG for this reaction at 298K when the partial pressures are PNO= .200atm, PO2= .100atm, and PNO3= .850atm
A 2.30-g sample of a large biomolecule was dissolved in 16.0 g of carbon tetrachloride. The boiling point of this solution was determined to be 77.85°C.
How many molecules of NO2 are needed to react with 0.250 mol of H2O? How many grams of HNO3 are produced when 60.0 g of NO2 completly reacts? How many grams of HNO3 can be produced if 225 g of NO2 is mixed with 55.2 g of H2O
Calculate the vibrational partition function of CS2 at 500K given the wavelength 558 cm-1 (symmetric stretch), 397 cm-1 (bend; two modes), and 2097 cm-1 (asymmetric stretch)
A nugget of pure gold of 4.80 grams absorbed heat of 283 Joules. if the temperature was 23.0°C initially then determine what was the final temperature of the Au gold it is given that the specific heat of Au= 0.129 J/(g·°C).
A graduated cylinder contains 10.0ml of water. If the volume of a single water molecule is 2.99 x 10e-23 cm e3, how many molecules are in the graduated cylinder?
If the gas is at 23C and 1.0 atm, what mass of helium is in the blimp? The Goodyear blimps, which frequently fly over sporting events, hold approximately 1.85×105 ft^3 of helium.
When potassium hydroxide runs out and we have to use potassium carbonate instead. Will potassium carbonate be a good titrant to use for selective precipitation?
use maxwell distribution of speeds to estimate the fraction of CO2 molecules at 300K that have speeds in the range 200 to 250 m/s.
How does the enthalpy change for the neutrlization of hydrochloric acid compare to the enthalpy change for the neutralization of aceitc acid. Explain any similarities or differences.
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