Histidine is a polyprotic acid. , using excel to:
a. calculate fractions (αi ) of all the species as a function of ph in the range of 1-13. use the equations given below. calculate αi at every 0.2 ph unit to obtain a smooth plot. plot the fractional concentration vs. ph for all the species.
b. identify and mark species at all intersection points and peaks.

Which of the following best explains why the end of a spoon sticking out of a cup of hot water also gets hot? question 7 options: the heat from the hot water is conducted through the spoon handle the hot water heats the air surrounding the upper part of the spoon. the hot water causes a physical change in the spoon handle. the hot water causes a chemical reaction to take place in the spoon.

Calculate the number of molecules present in 0.750 mol of mgo.

In the following redox reaction which is the oxidizing agent and which is the reducing agent? alcl3 + na nacl + al oxidizing agent = reducing agent =