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University of Maine

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Problem 120

Elements $X(\text {green})$ and $\mathrm{Y}$ (purple) react according to the following equation: $\mathrm{X}_{2}+3 \mathrm{Y}_{2} \longrightarrow 2 \mathrm{XY}_{3} .$ Which molecular

scene represents the product of the reaction?

Answer

C

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## Discussion

## Video Transcript

to look at a picture of a reaction. We can consider the small circles in each picture as an element and when they're combined that the compound. So, for example, if we look at A and we consider that purple is element, why in green is Element X is made up of x two? And why to which are reactive in this equation? If we look at B, we see that the purples are why, too. And there's also formula has one green and to purples. So we also have X Y two. Neither of those are products and are above reaction and C. We have one green or X with three wise attached and no other products do. We also have the X y three. But there's also some X and Y some X and also some. Why, too, so the only one that matches up with the Onley, the product that we need is C

## Recommended Questions

The reaction of an element X with element Y is represented in the following diagram. Which of the equations best describes this reaction?

a. $3 \mathrm{X}+8 \mathrm{Y} \rightarrow \mathrm{X}_{3} \mathrm{Y}_{8}$

b. $3 \mathrm{X}+6 \mathrm{Y} \rightarrow \mathrm{X}_{3} \mathrm{Y}_{6}$

c. $\mathrm{X}+2 \mathrm{Y} \rightarrow \mathrm{XY}_{2}$

d. $3 \mathrm{X}+8 \mathrm{Y} \rightarrow 3 \mathrm{XY}_{2}+2 \mathrm{Y}$

The reaction of an element $X$ with element $Y$ is represented in the following diagram. Which of the equations best describes this reaction?

a. $3 X+8 Y \rightarrow X_{3} Y_{8}$

b. $3 X+6 Y \rightarrow X_{3} Y_{6}$

c. $X+2 Y \rightarrow X Y_{2}$

d. $3 X+8 Y \rightarrow 3 X Y_{2}+2 Y$

The reaction of an element X with element Y is represented in the following diagram. Which of the equations best describes this reaction?

(Check your book to see image)

a. $3 \mathrm{X}+8 \mathrm{Y} \rightarrow \mathrm{X}_{3} \mathrm{Y}_{8}$

b. $3 \mathrm{X}+6 \mathrm{Y} \rightarrow \mathrm{X}_{3} \mathrm{Y}_{6}$

c. $X+2 Y \rightarrow X Y_{2}$

d. $3 \mathrm{X}+8 \mathrm{Y} \rightarrow 3 \mathrm{XY}_{2}+2 \mathrm{Y}$

The following pictures represent equilibrium mixtures for the interconversion of A molecules (red) and X, Y, or Z molecules (blue):

What is the sign of $\Delta G^{\circ}$ for each of the three reactions?

For the reaction depicted in the molecular scenes, X is red and Y is green.

(a) Write a balanced equation.

(b) Determine the sign of $\Delta S_{\mathrm{rxn}}$

(c) Which species has the highest molar entropy?

Predict the products and write a balanced molecular equation for each reaction. If no reaction occurs, write "NO REACTION."

\begin{equation}

\begin{array}{l}{\text { a. HCl(aq) }+\mathrm{Hg}_{2}\left(\mathrm{NO}_{3}\right)_{2}(a q) \longrightarrow} \\ {\text { b. } \mathrm{KHSO}_{3}(a q)+\mathrm{HNO}_{3}(a q)} \\ {\text { c. aqueous ammonium chloride and aqueous lead(II) nitrate }} \\ {\text { d. aqueous ammonium chloride and aqueous calcium }} \\ {\text { hydroxide }}\end{array}

\end{equation}

Two substances, W and X, react to form the products Y

and Z. Table 11.2 shows the moles of the reactants and

products involved when the reaction was carried out.

Use the data to determine the coefficients that will balance the equation

$\mathrm{W}+\mathrm{X} \rightarrow \mathrm{Y}+\mathrm{Z}$

The scenes below represent a chemical reaction between elements A (red) and B (green):

Which best represents the balanced equation for the reaction?

$\begin{array}{ll}{\text { (a) } 2 \mathrm{A}+2 \mathrm{B} \longrightarrow \mathrm{A}_{2}+\mathrm{B}_{2}} & {\text { (b) } \mathrm{A}_{2}+\mathrm{B}_{2} \longrightarrow 2 \mathrm{AB}} \\ {\text { (c) } \mathrm{B}_{2}+2 \mathrm{AB} \longrightarrow 2 \mathrm{B}_{2}+\mathrm{A}_{2}} & {\text { (d) } 4 \mathrm{A}_{2}+4 \mathrm{B}_{2} \longrightarrow 8 \mathrm{AB}}\end{array}$

Two substances, $\mathrm{W}$ and $\mathrm{X},$ react to form the products $\mathrm{Y}$

and $\mathrm{Z}$ . Table 11.2 shows the moles of the reactants and

products involved when the reaction was carried out.

Use the data to determine the coefficients that will bal-

ance the equation $\mathrm{W}+\mathrm{X} \rightarrow \mathrm{Y}+\mathrm{Z}$

The products formed in several reactions are given below. Identify the reactants (labeled $x$ and $y$ ) and write the complete balanced equation for each reaction.

(a) $x+y \rightarrow \mathrm{H}_{2} \mathrm{O}(\ell)+\mathrm{CaBr}_{2}(\mathrm{aq})$

(b) $x+y \rightarrow \operatorname{Mg}\left(\mathrm{NO}_{3}\right)_{2}(\mathrm{aq})+\mathrm{CO}_{2}(\mathrm{g})+\mathrm{H}_{2} \mathrm{O}(\ell)$

(c) $x+y \rightarrow \mathrm{BaSO}_{4}(\mathrm{s})+\mathrm{NaCl}(\mathrm{aq})$

(d) $x+y \rightarrow \mathrm{NH}_{4}^{+}(\mathrm{aq})+\mathrm{OH}^{-}(\mathrm{aq})$