The (110) planes in this crystal are separated by a distance of 2.238 Angstroms. What is the value of the observed angle (degrees) resulting from the diffraction of the above x-ray radiation.

Cr(oh)3 -> cr(3+) + 3oh-

You know how the first one if filled up like the objects do the same but with the other categories

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