As a solid substance is heated, its volume increases but its mass remains constant. Sketch a graph of density vs. temperature showing the trend you expect. Explain.
(haha I’m lost please help!!)

List the following gasses

Ch4 and ph3 are both covalent since they are composed both of non-metals.    ch4 is non- polar because of  london forces and has a geometry of tetrahedral  ph3 , on the other hand, is umbrella shaped polar and has dipole-dipole intermolecular force (imf) . since ph3 is polar, it has a stronger imf