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Draw the structure of propanoic acid (propionic acid) with the approiate hydrogen bonded water molecules -- that is, put in the maximum number of water molecules that could H bond with propionic acid. Remember -- H bonds (hydrogen bonds) are indicated by dashed lines -- not by solid lines (which are reserved for covalent bonds).
What combination of a molecular base and a salt of the conjugate acid of the chosen molecular base should you select to prepare a buffer solution that would maintain a pH of 10.00?
What is the ph of the solution obtained by mixing 30.00mL of 0.250 M HCl and 30.00 mL of 0.125 M NaOH?
What mass of sodium chloride would need to be added to the blood to bring the sodium ion concentration up to 0.138 M, assuming no change in blood volume?
What is the expected freezing point of a 0.50 m solution of Li2SO4 in water? Kf for water is 1.86°C/m.
The ice was poured out into another container leaving a wet, empty beaker that weighed 46.146g. How much ice was poured into the other container?
Lead(II) sulfide reacts with hydrogen peroxide to form lead(II) sulfate and water. How many grams of hydrogen peroxide are needed to react completely with 265 g of lead(II) sulfide?
What mass of NaOH is needed to precipitate the Cd2+ ions from 68.0 mL of 0.500 M Cd(NO3)2 solution?
In the combustion of propane for energy, how many kilojoules of heat are produced when 2 kilograms of propane are completely combusted in the presence of excess oxygen
Consider a cylinder filled with air with a piston and spring arrangement on top. The external pressure is 1 bar, the initial temperature of the air in the cylinder is 25 C.
Calculate the molar concentration of illinic acid and of its conjugate base illinate ion (in moles/L; M) in a 3 M illinate buffer at pH 7.5. The pKa of illinic acid is 6.7.
A sample of nitrogen gas is contained in a piston with a freely moving cylinder. At 0 C,the volume of the gas is 361 mL. To what temperature must the gas be heated to occupy a volume of 492 mL.
In each of the following groups of substances, pick the one that has the given property. Explain your reasoning for each.
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