1. the underlined portion of the chemical formula above is the and it represents a. coefficient; how many hydrogen atoms there are in one molecule b. subscript; how many hydrogen atoms there are in one molecule c. coefficient; how many water molecules there are d. subscript; how many water molecules there are 2. is 2h2 +o2 -> 2h2o. a balanced chemical equation? is it obeying the law of conservation of matter? a. yes, the equation is balanced.  there are the same number of hydrogen (h) and oxygen (o) atoms on both sides of the equation. b. no, the equation is not balanced.  the hydrogen (h) in the equation has less atoms represented on the products. c. no, the equation is not balanced.  the oxygen (o) in the equation has less atoms represented on the products.