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1. What is the volume percent of a solution prepared by dissolving 20 g of KOH in enough water to make a final volume of 120 mL? Show your work. How many mL of a 5% solution can be made from the solution in part a? Show your work
2. (a) Given that the molar mass of H2SO4 is 98.1 grams, determine the number of grams of H2SO4 needed to prepare 0.2 L of a 0.5 M H2SO4 solution. Show your work. (b) What volume, in Liters, of a 0.5 M H2SO4 solution can be prepared by diluting 100 mL of a 4 M H2SO4 solution? Show your work
Determine the theoretical and percent yields of ethanol if 684 g sucrose undergoes fermentation and 349 g ethanol is obtained?
a the pka values for oxalic acid h2c2o4 are 1.23 and 4.19respectively. write each equilibrium acid dissociation
Arrange the following solutions by increasing chloride ion molarity. 1 M NaCl, 1 M FeCl3, 5 M NaCl, 1 M CaCl2, 2 M FeCl3, 2 M CaCl2
Phenolphthalein,Ka= 7.0*10^-10 , is colorless in its protonated form (HX) and fuchsia in its ionized form (X-). At what pH will phenolphthalein be a perfect pink color
experiment beginning with 73.0 mmol isopentyl alcohol, how many grams could you theoretically produce assuming only a 65% attainable yield?
To calibrate the calorimeter electrically, a constant voltage of 3.6 V is applied and a current of 2.6 A flows for a period of 350 seconds. If the temperature rises from 20.3°C to 29.1°C, what is the heat capacity of the calorimeter
The addition of S2- ion to Fe(OH)2(s) results in the formation of FeS(s). Explain why the addition of S2- ion to Cr(OH)3(s) does not result in the formation of Cr2S3(s).
what is the final temperature once thermal equilibrium is reached. c) how much ice remains once thermal equilibrium is reached.
Problem- Identify the following statements as true or false. (Utilize the drop-down menu moreover select "True" or "False" for each. You should get all 6 correct.) 1) If a process increases the randomness of the particles of a system the entropy of..
Sometimes the structure of phosphoric acid is written with single bonds to both the OH groups and to the oxygen atom; other times the bond between the P and the O is shown as a double bond. The "truth" probably lies somewhere between. Explain
Problem- the typical energy differences for transitions in the microwave, IR, and electronic spectroscopies are 5x10^-22 J , 0.5x10^-19 and 1x10^-18 J. 1) Calculate the ratio of the number of molecules in two adjacent energy levels at 300 K in each..
What are the two compounds that might be in the unknown? if weighing 0.4862g when heated barely changed droppping to 0,4855g, when the product was converted to a chlorid the mass went up to 0,5247
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