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A 15.5 mL sample of 0.215 M KOH soultion required 21.2 mL of aqueous acdic soultion in a titration experiment. Calculate the molarity of the acetic acid solution.
Calculate the change in pH when 9.00 mL of 0.100 M HCl(aq) is added to 100.0 mL of a buffer solution that is 0.100 M in NH3(aq) and 0.100 M in NH4Cl(aq).
Calculate the concentration of H3O in a solution that contains 5.5 x 10^-5 M OH at 25 degrees celsius. Identify the solution as acid, basic, or neutral.
To characterize the elution properties of the solute in a way independent of the geometry of the chromatographic column, the retention constant R = Vo / Ve is used. R is equal to the fraction of solute in the void volume Vo and
A 500mL solution contains 1.68g NH3 and 4.05g (NH4)2SO4. How many mL of 12M HCl is needed to change the pH to 9.00?
The heat of fusion of ice(the heat associated with ice melting) is 6.0 kJ/mol. Find the temperature of the coffee after the ice melts.
The activatoin energy for the diffusion of copper in silver is 193,000 J/mol. Calculate the diffusion coefficient at 1200 K (927 degrees C), given that D at 1000 K (727 degrees C) is 1.0 x 10^-14 m^2/s
Find the flux, J, of oil droplets through the water to the top surface. The sink is 18 cm deep, and the concentration of oil on the plate is 0.1 mol/cm3. Assume that there is no oil at the top of the sink when you start. The diffusion coefficient ..
what Kelvin temperature will the vapor pressure be 3.00 times higher than it was at 329 K?
The population mean of the bulb lifetime is 950 h and the population standard deviation is 50 h. calculate the fraction of bulbs expected to have a lifetime less
For the reaction shown, calculate how many moles of each product form when the given amount of each reactant completely reacts. Assume that there is more than enough of the other reactant. C3H8(g)+5O2(g)->3CO2(g)+4H2)(g)
A mixture of gases contains 4.32 g of Ar, 7.88 g of BF3, and 4.86 g of N2. What is the partial pressure in atm of each component of this mixture if it is held in a 61.3-L vessel at 10.9 oC? Use R = 0.0821 L-atm/mol-K as the value of the gas consta..
Combustion of 3.00 g of this compound produced 7.06 g of CO2 and 1.93 g of H2O. What is the empirical formula of the unknown compound?
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