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Briefly describe two things that can be learned from examining emissions or absorption spectra of stars.
Europium (Eu) is used in older television screens to give a red color. The metal can be prepared by electrolysis of molten europium(III) chloride; chlorine gas is a by-product. Write and balance the equation for the reaction.
what mass of salt would have to be added to 1000.0 ml of water in order to raise the boiling point of the solution by
Find out the volume (in mL) of 5.16 M potassium hydroxide (KOH) that must be added to 44.7mL of 0.703 M hypochlorous acid (HClO) to yield a pH of 7.82.
The following charges on individual oil droplets were obtained during an experiment similar to Millikan's determine a charge
A balloon is filled to a diameter of 30.5 cm with air in Los Angeles when the temperature is 25 degrees C. It is brought to Flagstaff where the temperature is 5 degrees C
Calculate delta H for this reaction at 298K. Calculate delta G for this reaction at 298K. Calculate delta S for the reaction, for the surroundings, and the total delta S.
What is the difference between alpha-glucose and beta-glucose? and show the condensation of two glucose molecules to form a disaccharide with an alpha linkage; with a beta linkage.
Ethyl alcohol is soluble in water because of the OH group. Can you use extraction to separate benzoic acid from ethyl alcohol it is dissolved in?
The temperature inside the vessel is 35ºC. Calculate the total pressure inside the vessel after the reaction is complete.
Consider a solution formed by mixing 67.0 mL of 0.100 M H2SO4, 32.0 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.
When 19 mL of a solution containing .29 M Ca(OH)2 is diluted to 30 mL, a dilute solution is formed. What is the OH- concentration in 15 mL of the dilute solution
Calculate the CNaOAc and CHOAc necessary to make the desired buffer. Remember, the 0.100M specification indicates
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