PLEASE HELP THIS IS THE LAST DAY AND IM FAILING In this lab, what did the pennies represent? (im sorry if the words are small on the paper it makes me crop it so i had to put my camera farther away)

How do you identify the anode on a power source such as a battery? how do you identify the cathode? how are terms anion and cation?

Achemistry student needs to standardize a fresh solution of sodium hydroxide. he carefully weighs out of oxalic acid , a diprotic acid that can be purchased inexpensively in high purity, and dissolves it in of distilled water. the student then titrates the oxalic acid solution with his sodium hydroxide solution. when the titration reaches the equivalence point, the student finds he has used of sodium hydroxide solution.calculate the molarity of the student's sodium hydroxide solution. be sure your answer has the correct number of significant digits.

The diagram below shows the movement of particles. what does this piece of evidence best support? the collision theory the maxwell-boltzmann distribution the effect of pressure on reaction rates the effect of temperature on reaction rates