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A solution is created by adding 0.05 moles of H2CO3 (3.1 g, total mass) to 5-L of water, resulting in a pH of 4.2. What is the alkalinity of this water (in meq/L)? Does the answer make sense, why or why not
It requires 251 J to melt 2.22 g of sodium metal at its normal melting point of 98°C. Calculate the molar heat of fusion of sodium.
Arsenic Acid (H3AsO4) has Ka values of 2.5*10^-4, 5.6*10^-8, and 3*10^-13. What is the concentration of the HAsO42- dianion in a solution
Determine the Ka value of acetic acid at 105 degrees C from the following data: A 0.3 Molar aqueous solution of acetic acid shows a pH of 2.642 at 105 degrees C. You can use the approximation formula here because the concentration of the acetic ac..
One of the highest concentrations of peroxyacyl nitrates has been found in the Los Angeles (LA) basin at 30 ppb, reaching its peak at mid-afternoon. Most of the pollution in the LA basin is created in an area of only 3000 km^2
Predict the predominant alkene product that would form when 2-bromo-2methylpentane is treated with soldium methoxide in methanol.
Its normal boiling point is 111.0oC and its molar heat of vaporization is 35.9 kJ/mol. What would be the vapor pressure (in torr) of toluene at 75.00oC?
A 1.90 g sample of a large boimolecule was dissolved in 11.0 g of carbon tetrachloride. The boiling point of this solution was determined to be 77.85°C. Calculate the molar mass of the biomolecule
adiabatic expansion back to its initial temperature, (c) reversible isothermal compression back to 1.00 atm. Calculate q, w, delta U, and delta H for each step.
ephedrine is used as a bronchodilator and decongestant. phenobarbital is used as an anticonvulsant and sedative. what simple chemical test distinguishes these 2 medicines?
Milk spoils about 5x as fast at 300 K as it does at 250 K. What is the apparent activation barrier for the "milk spoiling" reaction
A buffer is made up 0.24 M propanoic acid, CH3CH2COOH, a weak monoprotic acid, and 0.17 M of sodium propanoate, CH3CH2COONa. What is the pH of the solution.
Derive an expression for the number of molecules with a speed (c) greater than some specified speed (c'). Recall that the number of molecules having speed in a certain range is the integral under the Maxwell-Boltzmann speed distribution curve ..
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