When we study (4), or the study of matter and energy, we need to know two things to figure out how fast an object is going. First, we need to know how far the object traveled, or the (5). Second, we need to know how long it took the object to reach its destination, or the (6). By dividing the total distance by the total time, we can find the (7) of the object. This speed can be used to find the amount of (8) the ball has (the energy of motion).

the answers would be

the first one and the second one

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.

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