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What ions and/or molecules are present in relatively large proportions in a solution of a weak acid H2S (aq)? You must select all the correct and none of the incorrect answers to get full credit. Check the periodic table here
H2SH+HS-S2-H2+S-H2SHS+
Draw the structure of the 4 possible ionization states of tyrosine and calculate the net charge for each state. Draw the titration curve for Tyrosine. The pKa of the carboxylic acid = 2.20. the pKa of the amino group is 9.20.
How many grams of oxygen are required to completely burn 5.90g of C3H8 in the following unbalanced
39 ml of .2 M HCL and 50 ml of .4 M NaOH are mixed. After mixing, but before they react, what is the new M of the HCL and NaOH?
A gas expands and does P-V work on the surroundings equal to 327 J. At the same time, it absorbs 121 J of heat from the surroundings. Calculate the change in energy of the gas.
In Flask A, you reacted 1.65 g Mg with 0.136 mol HCl. In Flask B, you reacted 2.21 g Mg with 0.098 mol HCl. Which ballon will inflate the most?
A 1 L solution of 1.5 M acetic acid and 1.5 M sodium acetate has a ph of 4.74. 10 ml of 0.1 M NaOH were added to the solution followed by the addition of 50 ml of 0.02 M HCl.
A professional emergency responder should be concerned about the following routes of radiation exposure for a person on scene and a person downtown?
How many grams of TiCl4 are needed to react completely with 155 L of H2 at 435 oC and 795 mm Hg pressure?
Describe the molecule xenon trioxide, XeO3, using four possible Lewis structures, one each with zero, one, two, or three Xe-O double bonds.
Calculate the total enthalpy change in the first stage and in both stages
If a sample of oxygen that occupies 1.00 x10^6 mL at 575 mmHg is subjected to a pressure of 1.25 atm, what is the final volume of the the sample?
Calculate the change in pH when 5.00 mL of .100 M HCL is added to 100 mL of a buffer solution
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