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what is the fundamental mechanism by which enzymes enhance the rate of chemical reactions
A 5.00g sample of water vapor, initially at 155C is cooled at atmospheric pressure, producing ice at -55C. Calculate the amount of heat energy lost by the water sample in this process, in kJ.
A sample of arabinose, C5H10O5, contains 0.6000 moles of the substance. How many carbon atoms are in the sample?
A 9.1 g sample of C6H5NH3Cl is dissolved in water to make 346 mL of solution. Determine the percentage deprotonation of the cation.
Nitrogen forms several gaseous oxides. One of them has a density of 1.27 g L-1 measured at 764 mmHg and 150C. write the formula of the compound
Calculate the concentration of chloride ions when 100.0 mL of 0.205 M sodium chloride is mixed with 250.0 mL of 0.150 M calcium chloride.
How many GRAMS of zinc iodide are present in 1.56 moles of this compound? and explain to me how to find it
Calculate the standard free energy change per mole assocatiated with the formation of solid SrSO4. Use the solubility product. Remember G(standard) equals -RTln(K) when all surface effects are neglected.
what mass of (NH4)2SO4 must be dissolved in 0.100L of 0.350M NH3 to produce a buffer solution with pH 10.05?
Atomic absorption spectrometry was used with the method of standard additions to determine the concentration of cadmium in a sample of an industrial waste stream
A second assay was performed by making a derivative, ammonium phospho-molybdate, which has visible absorption peak at ~ 400nm. From the Beer's Law plot, estimate the concentration of the unknown solution
What is the pH at the equivalence point? the Ka of hydrofluoric acid is 3.5x10^-4.
How many grams of CO2 can be produced by the reaction of 35.5 grams of C2H2 and 45.9 grams of O2? Please help with the balancing the equation
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