Which of the following equations is balanced correctly? a. 3 h2o → h2 + 3 o2 b. cl2 + 2 kbr → kcl + br2 c. 2 c2h2 + 5 o2 → 4 co2 + 2 h2o d. 2 c3h3 + o2 → 2 co2 + h2o

The correct answer is option C.

Explanation:

In balanced chemical reaction, number of atoms of each elements are equal on both the sides of the chemical reaction.

A.

Number of hydrogen atoms on reactant side : 6

Number of oxygen atoms on reactant side : 3

Number of hydrogen atoms on product side : 2

Number of oxygen atoms on product side : 6

Reaction is balanced incorrectly.

B.

Number of chlorine atoms on reactant side : 2

Number of potassium atoms on reactant side : 2

Number of bromine atoms on reactant side : 2

Number of chlorine atoms on product side : 1

Number of potassium atoms on product side : 1

Number of bromine atoms on product side : 2

Reaction is balanced incorrectly.

C.

Number of hydrogen atoms on reactant side : 4

Number of oxygen atoms on reactant side : 10

Number of carbon atoms on reactant side : 4

Number of hydrogen atoms on product side : 4

Number of oxygen atoms on product side : 10

Number of carbon atoms on product side : 4

Reaction is balanced correctly.

D.

Number of hydrogen atoms on reactant side : 6

Number of oxygen atoms on reactant side : 2

Number of carbon atoms on reactant side : 6

Number of hydrogen atoms on product side : 2

Number of oxygen atoms on product side : 5

Number of carbon atoms on product side : 2

Reaction is balanced incorrectly.

the independent variable, or the one that is intentionally manipulated is the speed.