Question

in any chemical process, matter is neither lost nor gained
the changing of substances to other substances by the breaking of bonds in reactants and the formation of bonds in products.
these are the elements or compounds that enter into a chemical reaction.
this is the substance(s) formed in a chemical reaction.
1.5 g of h2 added to 12 g of o2 produces
1 g of h2 added to 35.5 g of cl2 produces
:: chemical reaction :: reactants :: products :: 36.5 g of hcl

Explanation:

1. "In any chemical process, matter is neither lost nor gained" - This is the law of conservation of mass, a fundamental concept in chemical reactions.
2. "The changing of substances to other substances by the breaking of bonds in reactants and the formation of bonds in products" - This is the definition of a chemical reaction.
3. "These are the elements or compounds that enter into a chemical reaction" - These are reactants.
4. "This is the substance(s) formed in a chemical reaction" - These are products.
5. "1.5 g of H2 added to 12 g of O2 produces" - This is a description of reactants in a chemical - reaction setup.
6. "1 g of H2 added to 35.5 g of Cl2 produces" - This is also a description of reactants in a chemical - reaction setup, and from the reaction H2 + Cl2 = 2HCl, the products will be 36.5 g of HCl according to the law of conservation of mass and stoichiometry.

Answer:

1. Chemical Reaction
2. Chemical Reaction
3. Reactants
4. Products
5. Reactants
6. Reactants, 36.5 g of HCl