Justin designed an experiment to find out how running up bleachers affects his heart rate. First he records his resting heart
rate and then runs up the bleachers 10 times. Each time he reaches the top, he records his heartrate then rests 20
minutes.
Which is involved in Justin's experiment?
replication
repetition
both repetition and replication
neither repetition nor replication

a. a primary source combines several different accounts of an event. b. a primary source generally benefits from having been written after an event.

explanation:

atomic number of carbon is 6

electronic configuration of carbon is 1s²2s²2p²

orbital diagram of carbon is as shown here in the image.

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.

answer: i dont know the answer but this might

explanation:

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