Consider the following unbalanced equation. C3H8(g) + O2(g) → H2O(g) + CO2(g)
When the equation is completely balanced using
smallest whole numbers, the coefficient of o2 is
(1) 5 (2) 2 (3) 3 (4) 7

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   

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