A lab sample containing sodium chloride, ammonium chloride and sand. It initially weighs 2.715 grams, prior to heating. After heating that sample loses 0.269 grams. What is the percentage of ammonium chloride in that initial mixture?

Ibelieve it's celsius. hope this .

Sorry i dont understand the question can you rephase it?

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