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1.00 L solution containing 0.030 mol HA (pKa=2.50) and 0.020 mol NaA. Approximations [HA]=0.030 and [A-]=0.020 What is: Ka, FHA, FA, and approximate H
Two compounds have the same empirical formula. One substance is a gas, the other is a viscous liquid. How is it possible for two substances with the same empirical formula to have markedly different properties?
what is an example of a hypothesis testing for the percentage of ethanoic acid in vinegar? Give me examples of hypotheses and how to test them. thanks :)
You use a properly calibrated explosimeter to measure the flammable hazard inside a tank that contained toluene and may still have some residual product a. inside.
Write a balanced chemical equation when Magnesium metal burns in oxygen to form magnesium oxide, MgO
A solution of ethanol (C2H5OH) in water is prepared by dissolving 72.0 mL of ethanol (density = 0.79 g/cm3) in enough water to make 300.0 mL of solution. What is the molarity of the ethanol in this solution?
If 0.80 g of gas occupies 295mL at 25 degrees Celsius and 680 mm Hg of pressure, what is the molar mass of the gas?
An industrial chemist studying bleaching and sterilizing prepares a hypochlorite buffer using 0.150 M HClO and 0.150 M NaClO. (Ka for HClO = 2.9x10^-8.)
A 3.77g sample of oxalic acid (H2C2O4x2H2O) was dissolved in enough water to make 1000 mL of solution. Then 17.15mL of this oxalic acid solution was titrated to the end point with 22.05mL of an unknown sodium hydroxide soloution.
what concentration of NH4+ must be present in a 0.20M aqueous ammonia solution to prevent the percipitation of Mg(OH)2 if the ammonia solution
How are conditions of pressure and temperature, at which two phases coexist in equilibrium, shown on a phase diagram? By a line separating the phases by the endpoints of the line segment separating the phases
Why are the standard reagents used in neutralization titrations generally strong acids and bases rather than weak acids and bases?
One way to mesure thermal conductivity is to mesure by putting the object in a closed box with known qualities. The heater maintains the same change in heat through the boxes wall.
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