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You perform a serial dilution of a 5 M NaCl solution:First dilution- pipette 10mL of 5 M NaCl into 99 mL of water. Second dilution- pipette 1 mL of the first dilution into 99mL of water. Third dilution- pipette 100 ul of second dilution into 99 mL of water. What is the concentration of NaCl after the third dilution? _______ uM
Assume that you have a cylinder with a movable piston. What would happen to the gas pressure inside the cylinder if you do the following? Decrease the volume to one third the original volume while holding the temperature constant.
A mixture consisting of 50 grams of ethanol and 50 grams of water is distilled using an efficient column. How much water will remain in the distillation flask the instant all of the azeotrope
Using the thermodynamic data below, and a value of -717 kJ/mol for the Ulattice enthalpy for KCl, calculate the ionization energy of K. Hint: Remember to plug in numbers to the equation given in course content.
the compound as2i4 is synthesized by reaction of arsenic metal with arsenic triiodide. if a solid cubic block of
Calculate the overall energy change in kilojoules per mole for the formation of CaCL(s) from the elements. The following data are needed
A sample consisting of various gases contains 3.1×10-6 mole fraction of radon. This gas at a total pressure of 34 is shaken with water at 30 . Calculate the molar concentration of radon in the water.
Important information about Chem problem, A 25 mL sample of .13M HCl is mixed with 15mL of .24M NaOH. The pH of the resulting solution will be nearest. The answer is 11.9
Calculate the free energy change for the interconversion of glyceraldehyde-3-phosphate (G3P) and dihydroxyacetone phosphate (DHAP) if [DHAP] = 0.01M, [G3P]=0.001 M and deltaG= -1840 cal/mol at pH 7 and 25 deg Celcius
The reaction that occurs here is the reaction of iodide ions with peroxydisulfate ions to produce iodine molecules and sulfate ions. Write the balanced net ionic equation for this reaction.
Draw the following compound. Be sure to specify the stereochemistry via wedge-and-dash bonds.
Solid barium nitrate is slowly added to 175mL of a 0.0414 M ammonium carbonate solution. Explain what is the concentration of barium ion necessary to just initiate precipitation is
Explain both compounds have structures with six atoms in a ring. Depict Lewis structures for pyridine and pyrazine showing all resonance forms. Define the N atoms in the pyridine are opposite each other in the ring with 2 carbons
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