Reaction of A (green spheres) with B (blue spheres) is shown in the following diagram:
Which equation best describes the reaction?
a. A₂ + 2 B → A₂B₂
b. 10 A + 5 B₂ → 5 A₂B₂
c. 2 A + B₂ → A₂B₂
d. 5 A + 5 B₂ → 5 A₂B₂

Question

Reaction of A (green spheres) with B (blue spheres) is shown in the following diagram:

Which equation best describes the reaction?

a. A₂ + 2 B → A₂B₂

b. 10 A + 5 B₂ → 5 A₂B₂

c. 2 A + B₂ → A₂B₂

d. 5 A + 5 B₂ → 5 A₂B₂

Accepted Answer

Welcome back, everyone. The reaction of A red and be purple is shown below provide the balanced equation. Let's figure out how to write out this reaction in terms of our chemical formulas for each type of substance. So we're told that our red spheres represent the atom A and notice that in our reactant spheres that are red, we have two red spheres paired up together. And so we would have a subscript of two giving us a two. Now, according to the prompts are purple spheres are represented as the atom B and notice that are purple spheres on the reactant side are paired up in pairs of three. So we would have a subscript of three next to our Adam B. Now we're going to write out our reaction arrow for our products. And on our product side, notice that we have our red spheres paired up with a single blue sphere. So we have ultimately a total of six of our red purple paired spheres that would give us A plus B or in this case as our product A B. Now, as we stated, we have six of our red and purple paired spheres. So we would have six moles of A be on the product side. So we would place six as a coefficient in front of A B our product. Now, in order to balance this out, we need to compare our react inside to our product side. Notice that on our product side, we have six moles of both A and B or sorry, and six moles of B as given by our coefficient of six. Whereas on our reactant side, we have two moles of A given by the subscript two and three moles of B given by the subscript three. So if we place a coefficient of two in front of our reactant B, that would give us now six moles of B. And if we place a coefficient of three in front of our react in A, we would now have six moles of a, meaning our reaction is now balanced with those added coefficients. And so our final answer is going to be our highlighted balanced equation here with the coefficients three and two added to our react inside. This will correspond to choice A and the multiple choice as the correct answer. I hope this made sense and let us know if you have any questions.

Reaction of A (green spheres) with B (blue spheres) is shown in the following diagram:

Which equation best describes the reaction?
a. A₂ + 2 B → A₂B₂
b. 10 A + 5 B₂ → 5 A₂B₂
c. 2 A + B₂ → A₂B₂
d. 5 A + 5 B₂ → 5 A₂B₂

Verified video answer for a similar problem:

Key Concepts

Chemical Reaction

Stoichiometry

Molecular Representation