PLEASE HELP M this is due like in 10 min

how do you explain that 1 OF2 + H2o --> 1 O2 + 2 HF demonstrates that mass is conserved in a chemical l reaction

* the total mass of the reactants must equal the total mass of the  

products (Law of Conservation of Mass)

Chemical Equation             something that uses formulas and symbols to  

  represent the relative amounts of the reactants  

  and products of a chemical reaction

Explanation:

the correct option is c.

isotopes refers to different forms of the same element with the same atomic number but different mass number as a result of difference in their neutron numbers. isotopes have different relative atomic mass but share the same chemical properties.

since electrons are negative the answer is neagtaive