When limestone (which is principally CaCO3) is heated, carbon dioxide and quick- lime (CaO) are produced by the reaction CaCO3(s) + CaO(s) + CO2(g). If 17.6 g of CO2 was produced from the ther- mal decomposition of 40.92 g of CaCO3, what is the percentage yield of the reaction? Answer in units of %.​

Ibelieve your answer is true 

C. 1s22s22p63s23p43d104s24p5

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   

The answer is d- principle of faunal succession.