Question

consider the generic chemical reaction depicted below: 2a + b -> c + 2d. based on this reaction equation, what quantity of moles of \d\ are formed upon complete reaction of 2 moles of \b\? 0.5 1 2 4 question 4 the reactant in a chemical reaction that remains when a reaction stops because one of the reactants is completely consumed is called limiting reactant excess reactant catalyst spectator ion

Explanation:

Step1: Identify mole - ratio

From the reaction $2A + B
ightarrow C + 2D$, the mole - ratio of $B$ to $D$ is $1:2$.

Step2: Calculate moles of D

If we have 2 moles of $B$, and the mole - ratio of $B$ to $D$ is $1:2$, then the moles of $D$ formed is $2\times2 = 4$ moles.

The limiting reactant is the reactant that is completely consumed in a chemical reaction, causing the reaction to stop. The excess reactant is the reactant that remains after the reaction stops due to the complete consumption of the limiting reactant. A catalyst speeds up a reaction without being consumed, and a spectator ion is an ion that does not participate in the actual chemical change in a reaction. Since the question asks for the reactant that remains when a reaction stops because one of the reactants is completely consumed, it is the excess reactant.

Answer:

4