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the uncatalyzed decomposition of hydrogen peroxoide is first order with an activation energy of 75.3 kj/mol and a half life of 6 hrs at 40 degrees celcius. how many hours would it take for a solution of h202 to lose hald of its strength at 25 degrees celcius
What is the pH of a buffer that consists of 0.20 M NaH2PO4 and 0.40 M Na2HPO4? Ka = 6.2 × 10-8
If the solution has the same density and specific heat as water, what is ?H for this reaction (per mole of H2O produced)? Assume that the total volume is the sum of the individual volumes.
The selenite ion is an oxoanion of selenium bearing a negative two charge and containing three oxygen atoms. Write the formula for the selenite ion.
The EPA limit for lead in the water supply is 15 parts per billion by mass. Calculate the number of lead ions present in 1.00kg of water that is at the EPA limit for lead.
How much heat is released when 4.50 g of methane gas is burned CH4 (g) + 2O2(g) -> CO2 (g) + 2H2O(l) H=-890kJ
A 363 mL container holds 0.146 g of Ne and an unknown amount of Ar at 35°C and a total pressure of 636 mmHg. Calculate the moles of Ar present.
Mehtanol-water solutions behave as essentially ideal solutions (the activity coefficients which measure deviation from ideality are equal to or close to one).
a sample of nitrogen gas kept in a container of vulume 2.43 L and temp 27degree C exerts a pressure of 4.83 atm. calculate the number of moles of gas present
50.50 mL of 0.116 M HF is titrated with 0.1200 M NaOH. What is the pH after 50.50 mL of base have been added? The Ka for HF is 6.8 x 10-4
During a strenous workout, an athlete generates 1890.0 kj of heat energy. What mass of water would have to evaporate from the athlete's skin to dissipate this much heat?
Calculate the energy needed to raise the temperature of 180.0 g of water from 10.0 degrees Celsius to 40.0 degree Celsius. The molar heat capacity for water is 75.3 J/K mol.
We are asked to write the balanced equation when glucose is reacted with ammonium chloride + epichlorohydrin + isopropyl alcohol. What is the ultimate end product? Hopefully it is supposed to be some form of a quaternary ammonium radical attached to ..
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