Abalanced chemical equation shows the proportions of reactants and products necessary for a. the reaction to occur. c. energy use to be minimized. b. mass to be conserved. d. electrolysis to occur.

Option (b) is the correct answer.

Explanation:

A balanced equation is defined as the equation where number of atoms of the reactant equal to the number of atoms of the product.

This also means that mass of the reactants is equal to the mass of products in a chemical equation.

For example,

Total mass of reactants =

                                      = 116 g/mol

Total mass of products = g/mol

                                      =  116 g/mol

Hence, mass if conserved in a chemical reaction.

thus, we can conclude that a balanced chemical equation shows the proportions of reactants and products necessary for mass to be conserved.

vanderwaal's forces of attraction are the electrostatic intermolecular forces that exist in a molecule due to the temporary or permanent dipoles that are developed in a molecule. in , the major intermolecular forces are dipole-dipole interactions as the molecule is polar (bent structure). so the vanderwaal's forces of interaction in between molecules are the permanent dipole-dipole interactions that develop due to the dipole that exists in between the polar h - s bond. the positively charged hydrogen atom is attracted towards the negative end of the dipole that is sulfur of the adjacent molecule. therefore, these forces of attraction are relatively stronger than that of london dispersion forces that exist in non polar molecules.

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e