The following diagram represents the reaction of A (red...

The following diagram represents the reaction of A (red spheres) with $\mathrm{B}_{2}$ (blue spheres):
(a) Write a balanced equation for the reaction, and identify the limiting reactant.
(b) How many moles of product can be made from 1.0 mol of A and 1.0 mol of $\mathrm{B}_{2} ?$

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Key Concepts

Limiting Reactant

The limiting reactant is the substance in a chemical reaction that is entirely consumed first, preventing further reaction from occurring. Recognizing the limiting reactant is crucial because it determines the maximum amount of product that can be generated.

Balanced Chemical Equations

A balanced chemical equation represents the conservation of atoms, ensuring the same number of atoms for each element on both sides of the equation. This concept is essential for accurately predicting the relationships between reactants and products in any chemical reaction.

Mole Concept and Stoichiometry

The mole concept is the bridge between the atomic scale and the macroscopic scale, allowing chemists to count particles in terms of moles using Avogadro's number. Stoichiometry uses the mole ratios derived from a balanced chemical equation to quantitatively analyze and calculate the amounts of reactants consumed and products formed in chemical reactions.

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