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10 M solution of chloroacetic acid, ClCH2CO2H, has a pH of 1.95. calculate Ka for the acid.
The age of a rock was was estimated using 238U radiometric dating. The ratio of 238U to 206Pb (238U decays to 206Pb) was approximately equal to 1. If the half-life of 238U is 4.5 billion y, and if it is assumed there was no 206Pb initially, how ol..
The molar heat capacity of silver is 25.35 J/Mol * degrees celcius. Knowing how much energy it would take to raise the temperature of 11.7g of silver by 16.9 degrees celcius in joules. Answer the following question: What is the specific heat of si..
.134 mol of KCl and .230 mole of CaCl2 were dissolved in water. Calculate the total of number of moles of Cl- of ions in the solution ?
Determine the enthalpy change for the oxidation of ethanol to acetic acid, CH3CH2OH() + O2(g) -> CH3COOH() + H2O() given the thermochemical equations below.
Calculate the ratio of dihydrogen phosphate to hydrogen phosphate in the blood at pH 7.4. The Ka = 6.3 x 10 -8 5. For a weak acid with a pKa of 6.0 calculate the ratio of conjugate base to acid at a pH of 5.0.
Compute the enthalpy change for the dissolution of ammonium nitrate express your answers in units of kJ/mol.
Calculate the mass of pure silver that when heated from 12.0 degrees celcius to 15.2 degrees celcius it required 1.25 kj of energy
what are the possible sources of error when finding the density of a liquid and of a solid? what can be done to avoid these errors?
Calculate how much energy in the form of heat is available from 100mL of this mixture and compare it with the amount from pure gasoline.
You prepared a 0.250 M solution by diluting 8.45(+-0.04)mL of 28.0(+-0.5)mL wt.%NH3 (density=0.899(+-0.003)g/mL up to 500.0(+-0.2)mL. Find the uncertainty in 0.250 M.
How many liters of oxygen are needed to exactly react with 19.8 g of methane at STP?
what relative masses of dimethyl amine and dimethyl ammonium chloride do you need to prepare a buffer solution
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