9. The measure of the body's resistance to acceleration by some external force is its A. Weight
B. Inertial Mass
C. Volume
D. Opposition

The measurements of the body resistance to acceleration by some external force is its ,B. inertial mass

Explanation:

A balanced equation is defined as the equation which contains same number of atoms on both reactant and product side.

For example,

Number of atoms on reactant side are as follows.

Number of atoms on product side are as follows.

Therefore, balance this equation by multiplying by 3 on reactant side.

Hence, the balanced equation is as follows.

Thus, we can conclude that a coefficient 3 should be placed in front of to balance the reaction.