Question

question 6
how do we relate the reaction rate to the rate of disappearance of each reactant and the rate of appearance of each product?
we use the stoichiometric coefficients
we use the initial concentrations
we use the standard entropy values
we use bond energy values

Explanation:

To relate reaction rate to reactant disappearance and product appearance rates, we use stoichiometric coefficients. For a reaction like \( aA + bB
ightarrow cC + dD \), the rate relationships are \( -\frac{1}{a}\frac{\Delta[A]}{\Delta t}=-\frac{1}{b}\frac{\Delta[B]}{\Delta t}=\frac{1}{c}\frac{\Delta[C]}{\Delta t}=\frac{1}{d}\frac{\Delta[D]}{\Delta t} \). Initial concentrations relate to reaction progress over time, standard entropy/ bond energy values relate to thermodynamics (not rate - appearance/disappearance relations). So the correct option is the one with "we use the stoichiometric coefficients".

Answer:

The correct option is the one stating "we use the stoichiometric coefficients" (the fourth option in the list of choices provided for the question).