Why is oxygen an element?
a. it is essential to life
b. it cannot be broken down into a simpler substance through chemical means
c. it combines with hydrogen
d. it burns

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

Consider the story you just read. all but one of the choices below indicate that something is living.

Determine type of reaction & predict the product c3h12+o2 =