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What is the concentration of [Cl?] in a solution of 10 mL of 12 M HCl when 6 mL of water is added?
Calculate the pH of a 1.36x10^-2M solution of the decongestant ephedrine hydrochloride if the pKb of ephedrine (its conjugate base) is 3.86.
Consider the pH range for the following indicators and select the most appropriate indicator for the titration of an HCN solution with a NaOH titrant.
A student measures 0.2452 g of a monoprotic solid acid, and dissolves the solid in water to make 100.0 mL of solution. The entire solution is titrated to a phenolphthalein endpoint with 45.09 mL of 0.1752 M KOH.
Calculate the delta H and delta S if the temperature of 1.75 moles of Hg(l) is increased from 0.00C to 75.0C at 1 bar. Over this temperatur range, Cp,m(J K^-1 mol^-1)=30.093-4.944 x 10^-3T/K.
What volume of a 0.23 M solution of copper sulfate is needed to contain 3.21 millimoles of copper sulfate?
A dioxin-contaminated water source contains 0.081% dioxin by mass. How much dioxin is present in 4.2 L of this water? (Assume that the density of the solution is 1.01 g/mL.)
What mass (in grams) of NH4Cl is needed to prepare 450mL of 0.251 M NH4Cl solution?
The density of germanium is 5.325 g/cm^3 . If you made a 4 nm quantum dot of germanium, how many atoms would it contain? Assume the dot is spherical.
Physical propoerties and intermolecular forces, What type of intermolecular forces accounts for the following differences in each case?
Which substance contains molecules that will not form hydrogen bonds?
The solubility of oxygen gas in water at 25 °C and 1.0 atm pressure of oxygen is 0.041 g/L The solubility of oxygen in water at 3.0 atm and 25 °C is __________ g/L.
if a 2.743g sample of MgSO4 7H2O were heated strongly, what would be the expected mass of the cooled dehydrated salt? (use M=246.471g mol-1 as the molar mass of MgSO4 7H2O.
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