Identify the type of chemical reaction. H2CO3 → H2O + CO2 a. reversible
b. decomposition
c. synthesis
d. exchange

i think it is dna, i'm not totally sure but i think it might be.

i was thinking 4.0 v hope this

idk what the options are but

these is a strong electrostatic attraction between the ions hence a lot of energy is needed to overcome this attraction

this is why the boiling points are so high

the correct answer is 4) heat and pressure

metamorphic rocks arise from transformation of existing rocks types, in a process called metamorphism. during metamorphism the original rock(prolith) change into metamorphic rock by heating (150-200c) and pressure of more than 1000 bar. the original rock can be sedimentary, igneous, or existing metamorphic rock.