Apurified protein is in a hepes (n‑(2‑hydroxyethyl)piperazine‑n‑(2‑ ethanesulfonic acid)) buffer at ph 7 with 800 mm nacl. a 1 ml sample of the protein solution is placed in a tube made of dialysis membrane and dialyzed against 1.0 l of the same hepes buffer with 0 mm nacl. small molecules and ions, such as na, cl, and hepes, can diffuse across the dialysis membrane, but the protein cannot. once the dialysis has come to equilibrium, what is the concentration of nacl in the protein sample? assume no volume changes occur in the sample during the dialysis.

Fugu, also known as puffer fish, is a sushi delicacy that can also be lethal. puffer fish contain a powerful toxin that can kill an adult a few hours after ingestion. sushi chefs who prepare fugu must be specially trained because any contamination of the toxin-free areas of the fish can be deadly. recently this toxin has been put to good use, as scientists have discovered that a purified form of it can treat severe pain in cancer patients. this recent scientific discovery would fall under which area of chemistry? applied biochemistry pure organic chemistry pure physical chemistry applied inorganic chemistry

3.) for each of the following compounds, draw the major organic product of reaction with hcl or naoh and circle whether the starting materials and products will be more soluble in organic solvent or water benzoic acid + hcl: benzoic acid + naoh: oh benzoic acid water/organic water organic fluorenone hс: fluorenone + naoh: fluorenone water/organic water/organic веnzocaine + hci: benzocaine + n»oh: h2n benzocaine water/organic water organic o=

Given the following information: mass of proton = 1.00728 amu mass of neutron = 1.00866 amu mass of electron = 5.486 × 10^-4 amu speed of light = 2.9979 × 10^8 m/s calculate the nuclear binding energy (absolute value) of 3li^6. which has an atomic mass of 6.015126 amu. j/mol.