Which of the following are correctly balanced reactions? check all that apply.
a. mg + feo 2fe + mgo
b.2h2 + o2 2h2o
c.2k + br2 2kbr
d. c + cl2 ccl4

B and C

Step-by-step explanation:

We are given that

A.

On left side

Number of atoms of Fe =1

Number of atoms of O=1

Number of atoms of Mg=1

On right side

Number of atoms of Fe=2

Number of atoms of O=1

Number of atoms of Mg=1

Therefore ,the balance reaction is

Given reaction is not balanced reaction

B.

Number of atoms of oxygen and hydrogen  are equal on both sides .

Hence, the given reaction is balanced .

C.

The number of atoms of potassium and bromine are equal on both sides.

Therefore, the given reaction is balanced .

D.

Number of atoms of Chlorine are not equal on both sides therefore, the given reaction is not balanced.

Hence,option B and C are true.

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