The following pictures represent the progress of the reaction AS B in which A molecules (red spheres) are converted to B molecules (blue spheres).
(b) Draw a picture that shows the number of A and B molecules present at t = 3 min.

Verified step by step guidance

1. Identify the initial number of A molecules (red spheres) and B molecules (blue spheres) at t = 0 min.
2. Observe the progression of the reaction over time by examining the given pictures at different time intervals.
3. Determine the rate at which A molecules are being converted to B molecules by comparing the number of A and B molecules at each time interval.
4. Use the observed rate of conversion to estimate the number of A and B molecules at t = 3 min.
5. Draw a picture representing the estimated number of A and B molecules at t = 3 min, ensuring the total number of molecules remains constant.

Key Concepts

Chemical Reaction Progress

Chemical reactions involve the transformation of reactants into products over time. The progress of a reaction can be visualized by tracking the concentration or number of reactants and products at various time intervals. Understanding this concept is crucial for predicting the amounts of A and B molecules at a specific time, such as t = 3 min.

Stoichiometry

Stoichiometry is the quantitative relationship between reactants and products in a chemical reaction. It allows us to calculate the amounts of substances consumed and produced based on balanced chemical equations. In this context, knowing the stoichiometric coefficients can help determine how many A molecules convert to B molecules over time.

Reaction Rate

The reaction rate refers to the speed at which reactants are converted into products. It can be influenced by factors such as concentration, temperature, and catalysts. Understanding the reaction rate is essential for predicting how the number of A and B molecules changes over time, particularly at the specified time of 3 minutes.