Recent content by mcandrewsr

Thank you for the encouragement. I love positive support. By no means do I want to fake my data. I know the data is supposed to reflect the true packing efficiencies. The course is simply introducing main topics in chemistry, and goes into little detail (understandable considering it is a...

It even says you can use marshmallows instead of balls- anything "reasonably spherical" in shape. I'm sure it would be quite interesting to see what kind of results are found using marshmallows...which are cylindrical!

I understand what you mean. But is there any way I can make this experiment work doing it exactly as directed? It is a correspondence course, so I have no one to go to about it. At this point I am about to make up fake data to make the numbers work for me.

These are my original calculations: HCP: 13 units: 3 layers- 3 in bottom layer, 7 in middle layer, 3 in top layer Volume of "box" that fits tightly around the layers: l x w x h = 13 x 14.5 x 12.5 = 2356.25 Density in units/cm3: 13/2356.25 = 0.005517 FCC: 13 units: 3 layers- 4 in bottom...

So I'm getting the wrong answers because the experiment is poorly designed, not because I am doing it wrong? I thought it would make more sense to find the total volume of the spheres, then divide it by the volume of the "box". I just don't know how I am supposed to answer the questions...

I had to do an experiment in which I built examples of hexagonal closest packing, face-centered closest packing and a body-centered space lattice. I had to find the volume of a box that would fit tightly around them, and then calculate the density in units/cm3 (assuming a mass of 1 unit per...

Homework Statement Consider the following reaction, which takes place in an autoclave at 250 degrees C and 800 atm. NH3(g) + 7/4 O2(g) --> NO2(g) + 3/2 H20(g) Into the reaction vessel has been placed 200 L of NH3(g) and 120 L of O2(g). The reaction is allowed to go to completion...

How do I know the different charges of ions when they are in different states? Ex. How does Cr(s) have a different charge than the aqueous one? How do I figure this out for any others?

Homework Statement For each of the following situations, identify those for which a reaction likely to occur. For those that do occur, white a net ionic equation. a) Chromium dipped into silver nitrate. b) Gold immersed in hydrochloric acid c) Nickel pellets dropped into calcium acetate...