Lactic acid, the substance that builds up in muscles during exercise, has a molar mass of about 90 g and has a composition of 40.0% C, 6.71% H, and the rest is oxygen. What is the molecular formula of lactic acid?

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Tod ThielLv2

26 Sep 2019

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The build up of lactic acid in muscles causes pain during extreme physical exertion. The K_a for lactic acid (C₂H₅OCOOH) is 8.4 x 10^-4. Calculate the pH of a 0.06 M solution of lactic acid. Please show calculations.

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c.) 3.533

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1) During strenuous exercise lactic acid builds up in muscle tissues. in a 1.00 M aquous solution, 2.94 % lactic acid is ionized. What is the value of Ka for lactic acid?

2) A 1.0g sample of solid U3O8 is placed in a rigid 1.500 L flask. 1.007 atm of chlorine gas, Cl2 (g) is added to the flask and is heated to 862 C. The equation for the reaction that takes place is given:

U3O8 + 3 Cl2 = 3 UO2Cl2 + O2

When the system is at equilibrium, what is the particial pressure of O2?