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The rate constant of a chemical reaction raised from 0.100 s-1 to 3.00 s-1 upon elevate the temperature from 25.0 C to 35.0C. Delta T = -1.09x10-4
What are the molality and mole fraction of solute in a 36.3 percent by mass aqueous solution of formic acid (CH3OH)?
Compute the enthalpy change for the thermite reaction: 2Al(s)+Fe2O3(s)→2Fe(s)+Al2O3(s), ΔH°rxn=-850 kJ Explain when 8.00mol of Al undergoes the reaction with a stoichiometrically equivalent amount of Fe2O3.
During the Purification of Lactate Dehydrogenase (LDH) experiment, you will need 50ml of buffer A150. Buffer A150 is 30mM Tris (pH 8.8) and 150mM NaCl. Given 1L of 1.5M Tris and 500ml of 5M NaCl,
the water for the pan is not saturated with CO2. Will the reported percent CaCO3 in the original sample be too high, too low, or unaffected? Explain
Define why the benzene ring is more reactive towards electrophilic aromatic substitutions and why the electrophile will predominately go to the ortho as well as para positions.
If the endpoint is surpassed in the back-titration with NaOH, will the reported amount of antacid in the sample be too high or too low?
If a 180 piece of gold (density =19.32 ) is hammered into a sheet measuring 2.51.0 , what is the average thickness of the sheet in meters?
Explain what element is the central atom, Define how many bonds does the central atom form, is it polar or non-polar, Define what is the direction of electronegativity
A concentration cell contains electrodes made of the same metal and solutions containing the same ions but a different concentrations. Consider Zn electrode in 0.1 M ZnSO4 solution in one compartment and Zn electrode in 1.0 M ZnSO4 for another com..
Use atomic properties to explain why is xenon 11 times as soluble as helium in water at 0 degrees celcius on a mole basis.
The normal range for the carbonyl of a ketone is 1715 cm -1 . Why does the carbonyl peak for cyclopentanone appear at 1750 cm -1. Ring Strain
why is the symbol of the silicon-oxygen tetrahedron
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