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The volume percentage of CO2 in a mixture of that gas with N2 was determined by bubbling the mixture at 1.00 atm and 25*C through a solution of 0.0100 M NaHCO3 and measuring the pH. If the equilibrium pH was 6.50, what is the volume percentage of CO2
calculate the stoichiometric air-fuel ratio of a fuel blend containing 80 vol.% ethanol and 20 vol.% gasoline
A 3.5 L container is filled with gas at 1.00 atm. A piston then compresses the gas to 0.250 L. What is the new pressure
Calculate the PH of a 0.015 Solution of carbonic acid, and what is the concentration
Its volume in the liquid state is 1.00 cm3 and its volume in the vapour state is 1671 cm3. Find the work done by expansion due to evaporation and the change of internal energy of the system.
which of the following solutes dissolved in 1000 g of h20 would provide a solution with the lowest freezing pts?
A patient needs to take 875 mg of ibuprofen twice daily. The pills in the bottle are each 250. mg. How many pills does the patient need to take each time she wants the 875 mg dosage? Assume that these pills are scored and can be cut in half if necess..
Calculate the molar mass (g/mol) of the element to three significant figures.
To the alchemists, gold was the material representation of purity. It is a very soft metal that can be hammered into extremely thin sheets. If a 1.07 g piece of gold is hammered into a sheet whose area is 30.0 ft2,
Determine how many liters 8.93 g of carbon dioxide gas would occupy at 150°C and 1.00 atm
Combine your results in b with the total experimental value of BEta Mu ^x to obtain the attractive contribution to BEta mu ^x and estimate the value of cohesive coefficient t?
Calculate Delta H for the process. Given u ={(2a/RT) - b}/Cp,m; with Cp,m = 38.4j/K.mol; a=3.60dm6 atm and b= 0.44 dm3.mol.
How much heat is required to warm 1.40 kilograms of sand from 24.0 degrees Celsius to 100.0 degrees Celsius?
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