You have a peptide with the sequence HEEDRKYYLCG. You may assume that the side-chain pKa values from the textbook are correct for the peptide. You may further assume that, for any pH more than 2 pH units away from the pKa value, the group will be fully protonated or deprotonated. a) What is the charge on the peptide at pH 1? b) What is the charge on the peptide at pH 6? c) What is the charge on the peptide at pH 12.5?

y= 0.0624x+0.0123 R^2=0.9867

Wetlands are able to remove nutrients and chemicals from water as the water flows through the area. A developer is planning to destroy most of the wetlands near a bay. In three to five sentences, explain how destroying the wetlands would impact the bay’s water quality and ecosystem.

Question #2.  Beers Law Experiments Dilution question.  If I stated out with 1000mL of an 800mM solution and wanted to make a new dilute solution.  I would add ___mL of water and ___mL of the 800mM solution to make 10mL of a 100mM solution.   Hint:  Think C1V1 = C2V2

You are given a protein solution with a concentration of 0.15 mg/ml. If the molecular weight of the protein is 22,000 Da, express its initial concentration in moles/liter, μmoles/ml, and μmoles/μl, respectively. If we want 20 μmoles of proteins for a reaction, what volume do we need to prepare?

24 25 26 A chemistry student weighs out 0.0202 g of acrylic acid (HCH,CHCO,) into a 250. mL volumetric flask and dilutes to the mark with distilled water. He plans to titrate the acid with 0.1800M NAOH solution. Calculate the volume of NaOH solution the student will need to add to reach the equivalence point. Round your answer to 3 significant digits. mL x10 Continue Submit Assignment 2021 McGraw Hill LLC. All Rights Reserved. Terms of Use Privacy Center | Accessibility C 80 000 000 F1 F2 DII DD F3 F4 F5 F6 F7 F8 F9 F10 F11 F12 @ 2$4 % &

If it takes 50.00 mL of 0.500 M KOH solution to completely neutralize 125 mL of sulfuric acid solution (H2SO4), what is the concentration of the H2SO4 solution?

1. The toxicity of mercury depends greatly upon the formulation of the metal. Which of them (elemental, metal ion, or methyl-mercury) is more likely to be absorbed through the skin? Explain your answer.

Are there any DIFFERENT, new actions you can commit to? POLLUTE OUR WATER LESThink of simple things you can do on a regular basis. It is not helpful if you cannot do it regularly. Small steps are important too. Any action you take matters.

In each row check off the boxes that apply to the highlighted reactant. reaction HCH₂CO₂(aq) + NH3(aq) → CH₂CO₂(aq) + NH(aq) H₂(g) + 2 ICl(g) → 2 HCl(g) + I₂(g) HBr(aq) + NH3(aq) → Br (aq) + NH(aq) The highlighted reactant acts as a... (check all that apply) Brønsted-Lowry acid Brønsted-Lowry base Lewis acid Lewis base Brønsted-Lowry acid Brønsted-Lowry base Lewis acid Lewis base Brønsted-Lowry acid Brønsted-Lowry base Lewis acid Lewis base