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Question: The following structural formulas show three different compounds of carbon and hydrogen.

Below each structural formula, write the chemical formula for that compound. Label the double and triple bonds in these structures.

1. H - C - C - H
H H

2. H - C = C - H

3. H - C ≡ C - H



Answer :

GinnyAnswer
Let's analyze each of the three structural formulas for the compounds of carbon and hydrogen.

### First Compound:
```
H
|
H-C-C-H
|
H
```
In this structure, each carbon (C) atom is bonded to three hydrogen (H) atoms and one other carbon atom. There are only single bonds between the carbon atoms.

- Chemical formula: Each carbon is bonded to three hydrogens, and there are two carbons, so the chemical formula is [tex]\( C_2H_6 \)[/tex].
- Type of bond: There are single bonds between the carbon atoms.

### Second Compound:
```
H
|
H-C=C-H
|
H
```
In this structure, each carbon (C) atom is bonded to two hydrogen (H) atoms and one other carbon atom through a double bond.

- Chemical formula: Each carbon is bonded to two hydrogens, and there are two carbons, so the chemical formula is [tex]\( C_2H_4 \)[/tex].
- Type of bond: There is one double bond between the carbon atoms.

### Third Compound:
```
H-C≡C-H
```
In this structure, each carbon (C) atom is bonded to one hydrogen (H) atom and the other carbon atom through a triple bond.

- Chemical formula: Each carbon is bonded to one hydrogen, and there are two carbons, so the chemical formula is [tex]\( C_2H_2 \)[/tex].
- Type of bond: There is one triple bond between the carbon atoms.

### Summary:
1. First Compound:
- Chemical formula: [tex]\( C_2H_6 \)[/tex]
- Type of bond: Single bonds between carbons

2. Second Compound:
- Chemical formula: [tex]\( C_2H_4 \)[/tex]
- Type of bond: One double bond between carbons

3. Third Compound:
- Chemical formula: [tex]\( C_2H_2 \)[/tex]
- Type of bond: One triple bond between carbons

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