Below is an image of a cellular membrane.  Which part of the membrane is polar and which part is nonpolar?   

What is the atomic mass of the ion in the previous question if it has 11 protons, 10 electrons and 13 neutrons?

What mass (in grams) of ethanol can fill a 200.0 mL beaker if the density of ethanol is 0.789 g/mL?  

Dr. Maloney has asked you to make a solution of Hydrochloric acid (HCl) to be used in lab this week.  She says the class needs 500 mL of 2.5 M HCl.  After going to the stock room, you find a stock solution of HCl in the acid cabinet with a concentration of 12.0 M.  In order to prepare the dilution for class, you need to add [HCl] of the HCl stock solution to [water] of water.

Explain the differences between a Phase I and Phase II Environmental Site Assessment. As part of your answer, explain the objective of each

List five (5) of the relevant factors that the user and Phase II assessor must consult with each other to help define the scope and objective of a Phase II as presented in the ASCE webinar.  

Two-10,000 gallon USTs and one-5,000 gallon UST were removed from a site. The excavation resulted in a tank pit of 60 ft x 30 ft x 18 ft. The excavated soil was stockpiled on site. The total bulk density of soil in situ is 1.8 g/cm3 and that of the soil in the stockpiles is 1.6 g/cm3. Calculate the volume (yd3) and mass (tons) of the excavated soil. The density of water is 62.4 lbs/ft3.

You are assigned to be the Environmental Professional (EP) for an active industrial manufacturing complex. You are about to conduct the site visit of the property. List three (3) interior and seven (7) exterior observations you should be looking for to help identify any current uses likely to involve the use, treatment, storage, disposal, or generation of hazardous substances or petroleum products or to identify releases or material threat of future releases of hazardous substances or petroleum products to the environment.

Calculate the P(A-a)02:

A 71-year-old patient is currently on the following settings: BIPAP: 10/5, RR 18 and FIO2 45%   His ABG reveals the following: pH 7.31 PaCO2  49 Pa02 81 HCO3 24 Sa02 95 What should the respiratory therapist recommend?