Chemistry
Grade-9
Easy
Question
From which of the following we can find the molecular formula?
- Empirical formula
- Percentage yield
- Percentage composition
- Average molecular mass
Hint:
In some cases, the empirical formula is the same as the molecular formula.
The correct answer is: Empirical formula
- The empirical formula is also known as the simplest formula in chemistry. It gives the smallest whole number ratio of elements in a compound using subscripts following element symbols.
- The molecular formula is the expression of the number of atoms of each element in one molecule of a compound.
- In some cases, the empirical formula is the same as the molecular formula, which gives the actual number of atoms in a compound (e.g., H2O).
- Hence, we can find the molecular formula from empirical formula.
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