43 which temperature change indicates an increase in the average kinetic energy of the molecules in a sample? (1) 15°c to 298 k (3) 305 k to 0°c
(2) 37°c to 273 k (4) 355 k to 25°c

The increase in the average kinetic energy of the molecules needs the increase of temperature. The relation of ℃ and K is n ℃ = m K -273. So if we change all the K unit to ℃ unit, we can get the answer is (1).

Ithinks its false. tell me if im wrong

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