Use the balanced equation below to calculate how many grams of O2 are required to produce 358.5 grams of ZnO. ( Zn: 65.39 g/mol, O2: 32 g/mol, ZnO: 81.39 g/mol) 2 Zn + 1 O2 → 2 ZnO

14.5 grams

70.5 grams

29.1 grams

1302 grams

B. a graduated substance

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 se-ci  bonds is more polar  than s-br bond