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How many moles of H3O+ or OH - must you add per liter of HA solution to adjust its pH from 9.80 to 8.91? Assume negligible volume change.
Assume the caffeine solution is 15 mg of caffeine per mL. A student used 5 mL of caffeine solution in both part A and part B. Crude yields was 68 mg from the dichloromethane extract and 47mg from the MTBE extract.
what is the percent Zn in the mixture? (At the same temperature and pressure, the Mg/HCl reaction gave 24.2 L gas/mol Mg.)
Using your mean experimental value of R =20 ,and of n= 1.00, calcuate the molar volume of your H2 at STP (standar T=273 K,P= 760mm Hg),using the ideal gas law
Was measured at several temperatures and the following data was collected, Using this data, graph ln k 1/T. using your graph determine the value of Ea please show work and show a graph
The density of the unknown is 0.714g/mL. The Kf of nitrobenzene is 6.87 ^0C/m. Calculate the molar mass of the unknown.
Calculate the mass of each microstructure and the mass and composition of each phase within each microstructure. d.) Cool to 726 C. Sketch the morphology. Calculate the mass of each microstructure and the mass and composition of each phase within ..
salicylic acid with methanol to yield methyl salicylate why wouldnt you use a strong base like sodium hydroxide?
Draw an energy diagram for a reaction that starts with reactants whose energy is 20.0 kJ and has a ?H of 20.0 kJ. The activation energy for the reaction is 35.0 kj.
A 50 mL soln. of Mg(NO3)2 is mixed with a 50 mL solution of NaOH. The resulting precipitate, Mg(OH)2, that forms is 2.97g. Determine the concentration of solution of Mg(NO3)2
Draw the structure of the product that is formed when the compound shown below is treated with the following reagents:
Size of a hydrogen spherical balloon for lifting a payload, Determine the size of a spherical balloon filled with hydrogen at 30°C and atmospheric pressure for lifting 400Kg payload
Calculate the percent yield of if the reaction produces 169g of C2H5Cl .
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