In the spring of 2008,petrol cost 1.179 per liter in london. on the same day, the exchange rate was$1= 0.504 . what was the price of London petrol in dollars ($)per gallon (1 gal= 3.7854L)

The answer is c. 320 g

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   

What are the statements?

"electrical energy" transforms to "thermal energy".hope my answer has you : )