Final answer:
The content of the batches of chemicals can include random or fixed amounts of lead and other chemicals. Chemical reactions and stoichiometry involve studying the quantities of reactants and products in a balanced reaction.
Step-by-step explanation:
The content of the batches of chemicals can include:
- Random amounts of lead
- Random amounts of other chemicals
- Fixed amounts of lead
- Fixed amounts of other chemicals
Chemical reactions and chemical quantities involve different amounts of chemicals, which can vary randomly or be fixed. Stoichiometry is the study of the relationships between reactants and products in a chemical reaction, including the quantities involved.