1-butene, 2 trans-butene, 2cis butene?

Question

can anyone help find the density of these compounds for me?

also, does anyone know any good sites that has a lot of information [ mp, bp, density, mw, structure, etc. ] about many coumpounds ? thank you so much!

Answer 1

Wikipedia is pretty good, to be honest.

Also, typing the name of the compound into Google along with "MSDS" will pull up a number of Materials Safety Data Sheets for the given compound. They almost always have the relevant physical properties of the material. Also, an MSDS is much more reliable (from an academic source perspective) than Wikipedia.