How might criteria and constraints be used to evaluate competing design ideas.

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.

answer by yourhope:

how do models compare to real-world objects?

d. most models represent a real-world object in a simpler way.

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answer:

the reaction is type of combination reaction.

explanation:

on the product side, there are 2 molecules of bonded to fe   which means one atom of fe are combined two molecules of . so, balanced chemical equation becomes :

this reaction follows the reaction type of combination reaction. a combination reaction is defined as chemical reaction in which reactants combines together to form a single product.

it would be b. 6co2 + 6h2o --> c6h12o6 + 6o2