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The substance acetylsalicylic acid (aspirin) (HC9H7O4) is a weak acid (Ka = 3.0×10-4).
What is the pH of a 7.93×10-2 M aqueous solution of potassium acetylsalicylate, KC9H7O4?
pH = _________
This solution is _________
A 40-residue peptide (all alanine) called poly-alanine adopts an alpha-helical structure under physiological conditions (298.0 K), but unfolds into a random coil structure at temperatures above 313.0 K.
Question- Enough of a monprotic acid is dissolved in water to produce a 0.0106 M solution. The ph of the resulting solution is 2.64. Calculate the Ka for the acid.
What is the flow rate of pure molasses from the crystallizer, m4. What is the fraction of the feed that bypasses the crystallizer
a gas has a volume of 590mL at a temperature of -55.0 C. what volume will the gas occupy at 30.0C?
what is the annual cost of operation in a 70°F room if the door is opened 10 times a day with an average heat gain per opening of 200 kJ? How much would it cost to keep the inside at 35° F
Consider an insulated system containing 150 g of liquid water and 150 g of ice at equilibrium under atmospheric pressure. A total of 22 g of steam at 120±C is admitted to the system.
Is the gas constant 8.314J/mol*K or 8314J/mol*K? I am trying to find the correct R to use it in integration to calculate work ( work is the integral of pressure
Draw the molecule by placing atoms on the grid and connecting them with bonds. Include all lone pairs of electrons.
The partial pressure of carbon dioxide is 675 mm Hg. If argon gas added to the mixture causes the total pressure to become 2410 torr, what is the partial pressure of argon? Report your answer in atm.
A magnesium goes from its grond state to its first electronically excited state. I assume the ground state is a singlet.
Describe how you would prepare each of the following aqueous solutions. - 230 g of a solution that is 0.60 molal in Na2CO3 starting with the solid solute. - 1.30 L of a solution that is 18.0% Pb(NO3)2 by mass. (density = 1.16 g/mL)
you come across a beaker that contains water, aqueous ammonium acetate, and a precipitate of calcium phosphate. write the balanced equation for a reaction between two solutions containing ions that could produce this solution.
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