Which of the following should you use in order to balance a written chemical equation? subscripts superscripts coefficients a and c

Coefficients.

Explanation:

A general chemical reaction is given by:

aA + bB → cC + dD

Where a, b, c, and d are the stoichiometric coefficients. In a balanced equation, they will be written, so the amount of the elements will be equal on each side of the equation. The coefficient multiplies the atoms.

A subscript is a number that follows a letter below it, and in a chemical formula, it represents how much of that element is presented in the compound. For example in O₂, the subscript 2 represents that are two atoms of oxygen in the molecule.

A superscript follows the letter or number above it, and in an equation, it represents exponentiation: the number will be multiplied by itself the number times of the superscript. For example, in 5², the two represent that the 5 must be multiplied by itself two times: 5x5 = 25.

thats how its supposed to be

a gas, having a molecular weight of 13 kg/kmol and a kinematic viscosity of 0.25 cm2/s, flows through a pipe 0.25 m internal diameter and 5 km long at the rate of 0.4 m3/s and is delivered at atmospheric pressure.