I am looking for a program to overlay the structure of small molecules as an aid for my students in comparing the results of optimization geometries using different optimization methods. At this stage, we are thinking of atomic coodinates and a visual comparison. However, if it can be complement...

2 questions about ninhydrin the accusation made by the closer is not true at all! being off-topic?! being a homework question?! please read its comments too. I think the closer is a newcomer biter. It is not a good reason to close a question because it can be answered outside the StackExchange....

Is there a chemical treatment that could remove sodium and calcium ions from the surface of soda-lime glass to turn it into quartz glass, increasing the hardness?