Question

question 6
determine the number of sigma and pi bonds are in a molecule of n₂h₂.
number of σ bonds
number of π bonds
type numbers in the bo
part 1: 5 points
part 2: 5 points
10 points
question 7
methyl cyanoacrylate is the main component of many glues. below is the lewis structure for this organic compound. determine the number of pi bonds in the molecule.
h c≡n: h

h-c=c-c-ö-c-h

:o: h

Explanation:

Step1: Analyze the structure of \(N_2H_2\)

The structure of \(N_2H_2\) is \(H - N=N - H\). A single bond is a sigma bond (\(\sigma\)), and a double bond consists of one sigma bond and one pi bond (\(\pi\)).

Step2: Count the sigma bonds

In \(H - N=N - H\), there are 2 \(N - H\) single bonds and 1 \(N=N\) double bond (which has 1 \(\sigma\) bond). So the total number of \(\sigma\) bonds is \(2 + 1=3\).

Step3: Count the pi bonds

The \(N=N\) double bond has 1 \(\pi\) bond.

Step1: Analyze the bonds in methyl cyanoacrylate

In the Lewis structure of methyl cyanoacrylate:

• A triple bond (\(C\equiv N\)) has 2 \(\pi\) bonds.
• A double bond (\(C = C\) and \(C = O\)) has 1 \(\pi\) bond each.

Step2: Calculate the total number of pi bonds

There is 1 triple bond (\(C\equiv N\)) contributing 2 \(\pi\) bonds and 2 double bonds (\(C = C\) and \(C = O\)) contributing \(1 + 1 = 2\) \(\pi\) bonds. So in total \(2+2 = 4\) \(\pi\) bonds.

Answer:

number of \(\sigma\) bonds: \(3\)
number of \(\pi\) bonds: \(1\)

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