What's a certain indicator that a molecule is polar?
a. the molecule has a nonpolar covalent bond and the dipole is cancelled due to symmetrical arrangement of atoms
b. the molecule has a polar covalent bond and the dipole is cancelled due to symmetrical arrangement of atoms
c. the molecule has a nonpolar covalent bond and the dipole is established due to asymmetrical arrangement of atoms
d. the molecule has a polar calent bond and the dipole is established due to asymmetrical arrangement of atoms

i think so it’s will be b yes i believe its

  the   balanced   equation   for   reaction of   ca metal   with   o2 to   produce   cao   is as below

2 ca+ o2→ 2 cao2

  explanation

the reaction is   balanced     since the   number of atoms   in reactant side is   equal to   number of atoms   in   product side.   for   example   they   are 2   atom of   ca in   reactant   side   and   2   atoms of ca   in   the product side.

  the   process   is a   meet the   requirement   of   redox   reaction because :     calcium   is   oxidized   from   oxidation state 0   to 2+   while   oxygen   is reduced from   oxidation   state   0   to 2-

i think its 100.

hope this !

answer; capital earns interest; entrepreneurship receives a profit or incurs a loss;