Empirical formula
from class:
Intro to Chemistry
Definition
An empirical formula represents the simplest whole-number ratio of elements in a compound. It does not show the actual number of atoms, but rather the relative proportions.
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5 Must Know Facts For Your Next Test
- Empirical formulas are derived from experimental data.
- They can be identical to molecular formulas if the molecule's composition is already in the simplest ratio.
- The empirical formula for glucose (C6H12O6) is CH2O.
- To determine an empirical formula, convert mass percentages to moles and then simplify the ratios.
- Empirical formulas are essential for understanding stoichiometry in chemical reactions.
Review Questions
- What is an empirical formula and how does it differ from a molecular formula?
- How do you determine the empirical formula from mass percent composition?
- Why might two different compounds have the same empirical formula?
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