Answer
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Hint: There are two types of formulas that represent the number of atoms in a molecule and they are empirical formula and molecular formula. Both are not the same. Each one has its own importance.
Complete answer:
- In the question it is given to describe the difference between empirical and molecular formula and the relationship between them.
- Differences between empirical and molecular formulas are as follows.
- The relationship between empirical formula and molecular formula is as follows.
Molecular formula = n (empirical formula)
Where n = integer and might be equal to 1.
Note: For suppose the molecular formula of glucose is ${{C}_{6}}{{H}_{12}}{{O}_{6}}$ . The empirical formula of glucose is $C{{H}_{2}}O$ . The relationship between empirical formula and molecular formula of glucose is as follows. Then the molecular formula of glucose = 6 (Empirical formula) \[{{C}_{6}}{{H}_{12}}{{O}_{6}}=6(C{{H}_{2}}O)\]. In case of glucose n = 6.
Complete answer:
- In the question it is given to describe the difference between empirical and molecular formula and the relationship between them.
- Differences between empirical and molecular formulas are as follows.
S.NO | Empirical formula | Molecular formula |
1 | It is the simplest form to express the composition of the compound. | It is the original representation of the elemental composition of the compound. |
2. | It is derived initially from the weight percentage of the elements which are present in the compound. | It is related to total weight of the compound and derived after the empirical formula. |
3. | It contains the simplified ratio of the number of moles of the elements of the compound. | It is a multiple of empirical formula. |
4. | It is not used in chemical reactions. | It is commonly used in chemical reactions. |
- The relationship between empirical formula and molecular formula is as follows.
Molecular formula = n (empirical formula)
Where n = integer and might be equal to 1.
Note: For suppose the molecular formula of glucose is ${{C}_{6}}{{H}_{12}}{{O}_{6}}$ . The empirical formula of glucose is $C{{H}_{2}}O$ . The relationship between empirical formula and molecular formula of glucose is as follows. Then the molecular formula of glucose = 6 (Empirical formula) \[{{C}_{6}}{{H}_{12}}{{O}_{6}}=6(C{{H}_{2}}O)\]. In case of glucose n = 6.
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