When a Chemical Equation Is Balanced, It Will Have a Set

question 158

Multiple Choice

When a chemical equation is balanced, it will have a set of whole number coefficients that cannot be reduced to smaller whole numbers. What is the coefficient for O₂ when the following combustion reaction of a hydrocarbon is balanced? ___ C₇H₁₄ + ___ O₂ $\rarr$ ___ CO₂ + ___ H₂O

• A)42
• B)21
• C)11
• D)10
• E)none of these

---

Definitions:

Goods X

An unspecified product or commodity that is the subject of economic analysis or transaction.

Goods Y

A reference to a particular class or type of goods, often used in economic models.

Diminishing Marginal Rate

The Decline in the additional output produced when a new unit of input is added, with all other inputs held constant.

Substitution

The economic concept where consumers replace more expensive items with less costly alternatives, or firms replace inputs with more economical options.