Chemistry, covalent bonds. explain thoroughly. i know what a covalent bond is but this don't make sense.

edit: it says an oxygen atoms has six electrons in its outermost energy level. explain why two oxygen atoms must share four electrons when they form a covalent bond

Idon't really understand this can you me and show your work.☺☺[ chemistry b] subject [ electron transfer in lonic bonds]grade( 12)

An alkaline battery produces electrical energy according to the following equation. zn(s) + 2 mno2(s) + h2o(l) zn(oh)2(s) + mn2o3(s) (a) determine the limiting reactant if 17.5 g zn and 31.0 g mno2 are used. (type your answer using the format ch4 for ch4.) (b) determine the mass of zn(oh)2 produced. _ g

When balancing a chemical equation: