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Uric acid is one metabolic end product as well as is excreted from the body in urine. The acid dissociation constant of uric acid is Ka = 4.0 x 10-6 M. The pH of a urine sample is 6.00. Define what is the ratio of urate ion to uric acid in the urine?
1. 0.25
2. 1.5
3. 4.0
4. 6.0
5. 24
Above what temperature, in °C, will the following reaction become spontaneous? Assume free energy, enthalpy, and entropy are not temperature dependent.
Consider a solution formed by mixing 30.0 mL of 0.100 M H2SO4, 24.5 mL of 0.100 M HOCl, 25.0 mL of 0.200 M NaOH, 25.0 mL of 0.100 M Ca(OH)2, and 10.0 mL of 0.150 M KOH. Calculate the pH of this solution.
Cells carry out anabolic as well as catabolic pathways with some enzymes functioning in both types of pathways. a. Define why these enzymes catalyze near equilibrium reactions. b) Define why opposing anabolic and catabolic pathways must have diffe..
If an organic compound contains 58.8% C, 9.80% H, and 31.4% O and it has a molar mass of 204g/mol. Compute the empirical and molecular formulas of the compound
Calculate the OH concentration of a solution of Na2CrO4 0.225M. (the sodium salt of chromic acid). (Chromic acid is H2CrO4, a diprotic acid, Ka1= 1.80x10^-1, Ka2=3.20x10^-7 & Kw=1.00x10^-14).
Calculate the change in Gibbs free energy for each of the following sets of ΔH ° rxn , ΔS ° rxn , and T .
What is the molarity of a solution made from 23.1g of NaNO2 dissolved in enough water to make 500ml solution
Describe how this observation is consistent with the law of conservation of charge.
Calculate the concentration of ions in the following saturated solutions. (a) [I -] in AgI solution with [Ag+] = 9.6 multiplied by 10-9 M
How many moles of NaOH were used? How many moles of H3PO4 were in the cola sample? What is teh concentration of H3PO4 in the cola sample?
Calculate the enthalpy change in kJ when 19.1g of H2S is burned. 2H2S(g) + 3O2(g) --> 2SO2(g) + 2H20(g) Change in H= -1036kJ/mol
If it is known that 41.6 grams of PURE ELEMENT THAT IS NOT DIATOMIC represents 1.30 moles of this element, what is the atomic mass of the element?
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