Which term names the result of two or more atoms combining chemically? a. compound b. gas c. element d. reactant i'm giving 85 points explain and it needs to be !

The answer is A. compound 
A compound is a combination of two or more elements or types of atoms  chemically

the answer isn't B because a gas isn't a combination of two or more atoms .
it isn't C either because an element is a substance made of only one kind of an atom.
the answer isn't D because reactants are the starting materials in a chemical change

257 grams h2o i think

Ok so co(g) is not pronoused that. the only clue is that youpronouse it the oppisote way.