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For many compounds, empirical and molecular formulas are same. For example water
(H2O), carbon dioxide (CO2), ammonia (NH3), methane (CH4), sulphur dioxide (SO2) etc. Can
you show it why?
Answers
The empirical and molecular formulas are identical when the actual numbers of the various atoms in the molecule are equal to their simplest ratio.
A compound's molecular formula reveals the actual number of different atoms that form each of its molecules. The compound's empirical formula, in contrast, displays the most simple ratio of the atoms' numbers.
The empirical and molecular formulas are identical when the actual numbers of the various atoms in the molecule are equal to their simplest ratio.
Example: Each water molecule contains 2 H atoms and 1 O atom, and thus its molecular formula is H₂O. The simplest ratio of H : O is 2 : 1, and thus the empirical formula for water is also H₂O.
Each ammonia molecule contains 1 N atom and 3 H atoms; thus, its molecular formula is NH₃. The simplest ratio of N: H is 1 : 3, and thus the empirical formula for ammonia is also NH₃.
On the other hand, when the actual numbers of different atoms are not equal to their simplest ratio, the empirical and molecular formulas are different.
Example: the molecular formula and empirical formula for hydrogen peroxide are H₂O₂ and HO respectively.
The molecular formula tells us how many atoms of each element are in one molecule of a substance. The empirical formula is the molecular formula with subscripts reduced by the greatest common divisor (GCD).
To know more about empirical formulas, refer to:
brainly.in/question/6658564
brainly.in/question/624207
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