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If .050 moles of HA were dissolved in 1L of water, calculate the concentration of [HA], [H30+], and [A-] in the solution at equilibrium. What is the pH? Ka=7.94 x 10^-7, equivalence point ~ 9 mL, pH at equivalence ~ 9]
degree C and 600. torr contains 50% helium and 50% xenon by mass. what are the partical pressures of individual gases?
Sodium bicarbonate is often used as an antacid to neutralize excess hydrochloric acid in an upset stomach. What mass of hydrochloric acid (in grams) can be neutralized by 2.3g of sodium bicarbonate?
How many grams of liquid sodium (minimum) are needed to absorb 4.70 MJ of energy (in the form of heat) if the temperature of the sodium is not to increase by more than 10.0 °C?
Carbon Monoxide at a pressure of 720 mmhg reacts completely with O2 at a pressure of 360 mmhg in a sealed vessel to produce
What might you conclude about the structures of these 3 (X,Y,Z)compounds?
Deduce the structure of each alcohol (Structure of A and structure of B)
An aqueous solution is six percent by mass methanol,, and has a density = 0.988 g/mL. Determine the molarity of ethanol in the solution.
Compute the final temperature of the mixture (assuming no heat loss to the surroundings). The heat capacities of H2O(s) and H2O (l) are 2.08 and 4.18 J/g · °C, respectively, enthalpy of fusion for ice = 6.02 kJ/mol.
A 29.0-g sample of water at 260. K is mixed with 48.0 g water at 340. K. Calculate the final temperature of the mixture assuming no heat loss to the surroundings.
In the first step of the trypsin mechanism, the side-chain oxygen of Ser 195 attacks the carbonyl carbon of the substrate. Use PyMOL and your model of the enzyme substrate complex to determine the distance between these two atoms.
Beginning with 2.5g of manganese(ii) chloride and 6.991g of sodium acetate in 100mL of water, add 11mL of acetylacetone to get phase 2 system, next add 0.491g of potassium permanganatee to 25ml of water and them added to the previous solution. Fin..
What is the concentration of the H 2 SO 4 if a chemist titrates 300.0 mL of Sodium Hydroxide NaOH with a 5.0 M solution of NaOH and needs only 3.4 mL of the base to reach the endpoint,?
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