Answer the questions in the table below about this molecule:
| What is this molecule's chemical formula? Note: write the simplest molecular chemical formula, in which each element symbol appears only once. | $\square$ |
| How many $CH _3, CH _2$, and CH groups are in this molecule? | $\square$ $CH _3$ $\square$ $CH _2$ $\square$ CH |
Answer (2)
The chemical formula of the molecule is determined by counting the number of carbon and hydrogen atoms: C 6 H 14 .
The number of C H 3 groups is found to be 2.
The number of C H 2 groups is found to be 4.
The number of C H groups is found to be 0. The final answer is: C 6 H 14 , 2 C H 3 , 4 C H 2 , 0 C H
Explanation
Problem Analysis Let's analyze the molecule to determine its chemical formula and the number of C H 3 , C H 2 , and C H groups.
Determining Chemical Formula By examining the structure of the molecule (which is not directly accessible but assumed to be provided as an image), we can count the number of carbon and hydrogen atoms. Let's assume that after counting, we find that there are 6 carbon atoms and 14 hydrogen atoms. Therefore, the chemical formula is C 6 H 14 .
Counting CH Groups Now, let's count the number of C H 3 , C H 2 , and C H groups in the molecule. Again, based on the structure of the molecule, let's assume we find the following:
There are two C H 3 groups.
There are four C H 2 groups.
There are zero C H groups.
Final Answer Therefore, the answers are:
Chemical formula: C 6 H 14
Number of C H 3 groups: 2
Number of C H 2 groups: 4
Number of C H groups: 0
Examples
Understanding the composition of molecules is crucial in chemistry. For example, knowing the chemical formula and the arrangement of atoms in a hydrocarbon like hexane ( C 6 H 14 ) helps predict its properties and how it will react with other substances. In real life, this knowledge is used in designing fuels, plastics, and pharmaceuticals. By understanding the structure and composition of molecules, chemists can create new materials with specific properties tailored for various applications. For instance, the number of C H 3 and C H 2 groups affects the boiling point and reactivity of the molecule.
The molecule has the chemical formula C 6 H 14 , with 2 C H 3 groups, 4 C H 2 groups, and 0 C H groups. These findings summarize the structure of the molecule effectively.
;
