Identify the type of chemical reaction

h2co3 -> h2o + co2

a) decomposition
b) exchange
c) reversible
d) synthesis

when a reversible reaction is occurring in both directions at the same rate; the products and reactants do not change in concentration. a chemical reaction where the compound is broken into its constituent parts.

answer; polycythemia is the correct answer;

a "theory" a suggestion that is not 100 % accurate, or a figure. some people say its a theory because they of all the passed theory's about one subject. it depends sometimes theory might be accurate and sometimes they are.

b. climate change will cause an increase in biodiversity of all ecosystems.

hope this