If a chemical reaction such as photosynthesis begins with 6 atoms of carbon (c), how many atoms of carbon (c) should be in the products?
a) 2 atoms of carbon (c)
b) 3 atoms of carbon (c)
c) 6 atoms of carbon (c)
d) 12 atoms of carbon (c)

the potential energy of the reactants is 200j.

from the energy diagram, the energy of the product formed is 350j; this means that, this reaction is an endothermic reaction, because it absorbs energy from its environment.

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