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When performing Hess' Law calculations, if you reverse a chemical reaction, you must reverse the sign of DH. Explain why.
Suppose that during the NaOH standardization procedure you spill some weighted KHP sample before it can be dissolved in water. You continue with the procedure as nothing had happened. How will this error influnece the calculated NaOH concentration? a..
Specified the balanced reaction below for the oxidation of ethanol by potassium dichromate, compute the number of liters of a 0.600 M K2Cr2O7 solution required to generate 0.1665 moles of C2H4O2 from a solution containing excess ethanol and HCL.
Calculate the final molarity of bromide anion in the solution. You can assume the volume of the solution doesn't change when the sodium bromide is dissolved in
The rate of waste brine removal (Stream 6) 4.2. The rate of desalinized water (potable water) production (Stream 4) 4.3. The fraction of the brine leaving the osmosis cell that is recycled
how many mL of 1.00 M hydrochloric acid is needed to prepare a 100.0 mL solution of hydrochloric acid with pH = 5.0 that also contains 0.01667 M MgCl2?
What is the density of an object that has a volume of 4.5 L and a mass of 54.0 grams? choose one below: 0.083 g/L 12 g/L 1.2 g/L 12 g/mL 83 g/L
It has only one active site! Describe how four bases with different geometries can fit into a single active site and how does the enzyme differentiate between the four bases
Complete and balance the following redox equation. What is the coefficient of H2O when the equation is balanced using the set of smallest while-number coefficients. MnO4^- + SO3^2- ---> Mn^2+ + SO4^2- (acidic solution)
what is the molality of a solution prepared by dissolving 413 mg of kbr in 6.45 ml of water at 25.0 0c. the density of
Draw a structural formula of an alkene or alkenes (if more than one) that undergo acid-catalyzed hydration and without rearrangement give 1-methylcyclohexanol as the MAJOR product.
Your supervisor gives you a bottle of Tris and asks you to prepare 250 mL of 80 mM solution of Tris. In this case, you should weigh out __________ g of Tris and dissolve in ~200 mL of water. After completely dissolved, adjust the total volume to 250 ..
HClO is a weak acid (Ka = 4.0 x 10^-8) and so salt NaClO acts as a weak base. What is the pH of a solution that is 0.020 M in NaClO
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