How to predict the products of the synthesis reaction Srl2 + Br2 ?

Which of these conditions most likely produces an unstable isotope?

All cells are made of four types of acids, lipids, proteins, and carbohydrates.

16. in a reaction that has reached equilibrium, a. the forward and reverse reactions are occurring at the same rate. b. the reactants and products are in equal concentrations. c. the forward reaction has gone further than the reverse reaction. d. there are equal numbers of atoms on both sides of the equation. e. a, b, and d are correct.