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Para-amino benzoic acid, PABA, HC7H6NO2 is used in some sunscreen agents. A solution is made by dissolving .263 mol of PABA in enough water to make 750mL of solution. The solution has [H+]=2.6E-3 M. Explain what is the Ka for PABA?
The formula weight of MnSO4 monohydrate is 168.97 g/mol. MUST SHOW WORK!! A) hydrated B) solvated C) saturated D) unsaturated E) supersaturated
a police officer is driving due north at a constant speed of22 ms relative to the ground when shenotices a truck on the
A 24-kg child receives 2.85x10^6 B particles, each with an energy of 4.30x10^-13 J. If the RBE=0.40, how many millirem did the child receive?
how to you determine the equilibrium constant for hydration. Rank the carbonyl compounds, but i'm not even sure how to figure it out in the first place
A liquid has a H vaporization of 35.5kJ/mol and a boiling point 0f 122 degrees celcius at 1.00 atm.What is its vapour pressure at 109 degrees celcius.
if the heat of neutralization of aqueous benzoic acid is 54.6 kjmol what is the enthalpy of ionization on benzoic
A sample of ethanol (C2H5OH) has a mass of 45.0 g. How many carbon atoms does the sample contain?
how many grams of sodium sulfide are formed if 1.60 g of hydrogen sulfide is bubbled into a solution containing 2.13 g
9.780 grams of gaseous mixture contains ethane ,C2H6 and propane ,C3H8. it needs 1.120mol of oxygen when complete combustion to form CO2 and H2O. Compute the mass percent of C2H6 in the original mixture.
Explain how grams of Cu would be deposited and how many liters of Cl2 gas would be produced at 81oC and 1.96atm by passing a current of 22.0 A for 16.0 hrs
The equilibrium membrane potential for the case of multiple ions will depend not only on the concentrations of the ions within and outside the cell, but also on the permeability of the cell membrane to each ion Pi. Consider a situation in which on..
A titration was performed at 25 degrees C and the Ksp of a slighlty soluble salt was determined to be 1.5×10-4. Calculate the standard Gibbs Free Energy of this salt. R = 8.314 J/mol-K
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