Consider these chemical equations.

[tex]\[
\begin{array}{l}
N_2(g) + 3H_2(g) \rightarrow 2NH_3(g) \\
C(s) + 2H_2(g) \rightarrow CH_4(g) \\
4H_2(g) + 2C(s) + N_2(g) \rightarrow 2HCN(g) + 3H_2(g)
\end{array}
\][/tex]

Which equation(s) do you need to reverse in order to calculate the overall equation for the formation of $HCN$ and $H_2$ from $NH_3$ and $CH_4$? Check all that apply.

[tex]\[
\begin{array}{l}
N_2(g) + 3H_2(g) \rightarrow 2NH_3(g) \\
C(s) + 2H_2(g) \rightarrow CH_4(g) \\
4H_2(g) + 2C(s) + N_2(g) \rightarrow 2HCN(g) + 3H_2(g)
\end{array}
\][/tex]

Question

01-07-2024
Chemistry

Answered

Consider these chemical equations.

[tex]\[
\begin{array}{l}
N_2(g) + 3H_2(g) \rightarrow 2NH_3(g) \\
C(s) + 2H_2(g) \rightarrow CH_4(g) \\
4H_2(g) + 2C(s) + N_2(g) \rightarrow 2HCN(g) + 3H_2(g)
\end{array}
\][/tex]

Which equation(s) do you need to reverse in order to calculate the overall equation for the formation of $HCN$ and $H_2$ from $NH_3$ and $CH_4$? Check all that apply.

[tex]\[
\begin{array}{l}
N_2(g) + 3H_2(g) \rightarrow 2NH_3(g) \\
C(s) + 2H_2(g) \rightarrow CH_4(g) \\
4H_2(g) + 2C(s) + N_2(g) \rightarrow 2HCN(g) + 3H_2(g)
\end{array}
\][/tex]

Answer :

Other Questions

What is the length of one of the legs of a [tex]$45^{\circ}-45^{\circ}-90^{\circ}$[/tex] triangle if the hypotenuse measures 12 inches?A. [tex]$12 \sqrt{2}$[/te

What is the underlying pathophysiology of globus sensation, and which diagnostic tests are commonly used to differentiate it from other conditions?a) Globus sen

Select the correct answer.Lisa's company, ABC Ltd., lost its biggest client and is now facing a financial crunch. Most of her colleagues have resigned, but Lisa

assume you will receive $1000,000.00 in 15 years, and the appropriate interest rate is 7% per year. What is the present value of this cash flow?

Find the sum or difference:1. [tex]$1 - 80 + 77$[/tex]2. [tex]$77 + 60$[/tex]3. [tex]$-105 - (-122)$[/tex]4. [tex]$185 - (-154)$[/tex]

Which form of a linear equation is defined by [tex]$y = mx + b$[/tex]?A. Parallel form B. Slope-intercept form C. Standard form D. Point-slope form

An injury that results from exposure to a single incident in the work environment is

Evaluate using a logarithm table.i. [tex]$\frac{5.432 \times 729.1}{279.5}$[/tex]

Select the correct answer.What is the quantity of goods and services that sellers are willing and able to sell known as?A. inflation B. demand C. supply D. r

Which of the following bones is commonly referred to as the "jaw bone"?A) MaxillaB) MandibleC) Occipital boneD) Hyoid bone

GinnyAnswer GinnyAnswer · Answer 1 · 2024-07-01T11:54:47-04:00

To determine which equations need to be reversed to form [tex]$HCN$[/tex] and [tex]$H_2$[/tex] from [tex]$NH_3$[/tex] and [tex]$CH_4$[/tex], let's analyze the given equations and the desired overall reaction.

The given equations are:

1. $ N_2(g) + 3 H_2(g) \rightarrow 2 NH_3(g) $
2. $ C(s) + 2 H_2(g) \rightarrow CH_4(g) $
3. $ 4 H_2(g) + 2 C(s) + N_2(g) \rightarrow 2 HCN(g) + 3 H_2(g) $

Our goal is the formation of $ HCN $ and $ H_2 $ from $ NH_3 $ and $ CH_4 $.

### Step-by-Step Solution:

Step 1: Reverse the first equation to decompose $ NH_3 $:
[tex]\[ 2 NH_3(g) \rightarrow N_2(g) + 3 H_2(g) \][/tex]
By reversing this equation, we obtain $ N_2 $ and $ H_2 $ from $ NH_3 $.

Step 2: Reverse the second equation to decompose $ CH_4 $:
[tex]\[ CH_4(g) \rightarrow C(s) + 2 H_2(g) \][/tex]
By reversing this equation, we obtain $ C $ and $ H_2 $ from $ CH_4 $.

Step 3: The third equation is already in the required form:
[tex]\[ 4 H_2(g) + 2 C(s) + N_2(g) \rightarrow 2 HCN(g) + 3 H_2(g) \][/tex]
This equation directly forms $ HCN $ and $ H_2 $.

### Conclusion:
To find the overall equation for the formation of $ HCN $ and $ H_2 $ from $ NH_3 $ and $ CH_4 $, we need to reverse the following equations:

- The first equation: $ N_2(g) + 3 H_2(g) \rightarrow 2 NH_3(g) $
- The second equation: $ C(s) + 2 H_2(g) \rightarrow CH_4(g) $

Thus, the equations that need to be reversed are:

1. $ N_2(g) + 3 H_2(g) \rightarrow 2 NH_3(g) $
2. $ C(s) + 2 H_2(g) \rightarrow CH_4(g) $

In summary, the correct equations to reverse are the first and second equations.