Chapter 12, Problem 9STP

Interpretation Introduction

Interpretation: To state whether statement I and statement II are true or false. To determine if statement II is the correct explanation of statement I.

Concept Introduction: The coefficients are the numbers that are written in front of the chemical formula/symbol in order to balance a chemical reaction. The coefficients help in determining the conversion factors between the number of moles for two different substances in a chemical equation.

Answer to Problem 9STP

Statement I is the correct explanation for Statement II.

Explanation of Solution

For a balanced chemical equation, coefficients are important and conversion factors between the number of moles for two different substances in a chemical equation.

The coefficients represent the relative masses of reactants or products in a balanced chemical equation.

Therefore, the given statement (a statement I) is true.

The mass can neither be created nor destroyed as defined by the law of conversion of mass. In a chemical reaction, the mass remains conserved. The mass of reactants and the mass of products must be identical in a chemical equation as per the law of conservation of mass.

Therefore, statement II is true.

Conclusion

Thus, the statement I is the correct explanation for Statement II.