A sign in town gives the limit at 50.00 km/hr. what is this speed in cm/sec

1388.9 just multiply the speed by 27.778

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   

Answercreating graphs and performing calculations;