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A microbiologist is preparing a medium on which to culture E. coli bacteria. She buffers the medium at pH 7.00 to minimize the effect of acid-producing fermentation. What volumes of equimolar aqueous solutions of K2HPO4 and KH2PO4 must she combine to make 100 mL of the pH 7.00 buffer?
The combustion of B2H6 occurs according to the following equation. Using the enthalpies of formation, calculate the energy (kJ) released when 4.00 g of B2H6 reacts.
a 35.8-g sample of cadmium metal was melted by an electric heater providing 4.66 js of heat. if it took 6.92 min from
Explain The pentose phosphate pathway is another possible direction for G-6-P. What are the two major products of the pentose phosphate pathway
high boiling point are obtained now you need to identify the limiting reagent and compute the percent yield of nitrobenzene
SbCl3(s)+H2O(l) -> SbOCl(s)+2HCl(g) In this reaction what is the percentage of Cl in SbOCl and in 2HCl
If 0.130 g of p-aminophenol is allowed to react with excess acetic anhydride, what is the theoretical yield of acetaminophen in moles. In grams
A 2.770 g sample of a compound containing only carbon, hydrogen, and oxygen burns in excess oxygen to produce 4.06 g of CO2 and 1.66 g of H2O. Calculate the mass (in g) of C in the sample.
Calculate the resulting pH if 365 mL of 2.88 M HNO3 is mixed with 335 mL of 1.10 M Ca(OH)2 solution.
For a certain reaction delta H=-76.8 and delta S=-217 If n=3 calculate E for the reaction at 25 degrees.
How many milliliters of a stock solution of 2.00M KNO3 would you need to prepare 100.0 mL of 0.150M KNO3?
Identify which of the following are oxidation-reduction reactions, and if they are, identify the oxidizing agent, the reducing agent, the substance being oxidized, and the substance being reduced.
What is the volume occupied by 25.0 gm of Ar (g) at a temperature of 301K and pressure of 1.30atm.
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