What is the mass of one mole of caco3

"1 x Ca = 1 x 40 = 40 
1 x C = 1 x 12 = 12 
3 x O = 3 x 16 = 48 

40 + 12 + 48 = 100 (Mr of CaCO3) 

moles = mass / Mr 
mass = moles x Mr 
mass = 1 mole x 100 = 100grams."

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