The moon cannot be seen during which phase?

New moon is the phase in which it cannot be seen

New Moon. The Moon's unilluminated side is facing the Earth. The Moon is not visible except during a solar eclipse. The lighted side of the Moon faces away from the Earth. This means that the Sun, Earth, and Moon are almost in a straight line, with the Moon in between the Sun and the Earth.

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   

Answer( precipitate );