Isooctane has the molecular formula C8H18. What is its empirical formula
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Answer:
Its empirical formula is
Explanation:
The empirical formula of a compound has the relative number of atoms in the molecule, expressed in the simplest whole-number ratios.
We know that the molecular formula of Isooctane is :
If we want to obtain the empirical formula we need to simplify the numbers ''8'' and ''18'' to obtain the simplest whole-number ratios.
If we do this, we find that ''8'' can be simplified by 8,4,2 or 1.
The number ''18'' can be simplified by 18,9,6,3 or 1.
The highest number which is common to ''8'' and ''18'' is the number 2.
If we simplify the molecular formula of Isooctane by 2 ⇒
⇒
The empirical formula of Isooctane is
Finding the empirical formula starting from the molecular formula is pretty much finding a least common factor for the subscripts. 8 and 18 can both reduce by two, making it C4H9.
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B. Na2SO4
C. KCl
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Answer:
B.
Explanation:
Hello,
The solubility of HgS is increased by adding due to common ion effect which consists on the effect that the higher solubility of
has over the HgS as the sulfur-based ions modify the solubility product. In such a way, by adding the sulfate, the equilibrium will be shifted rightwards, therefore the solubility is increased.
Best regards.
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Answer:
False. The statement is not entirely accurate.
Explanation:
Infrared (IR) photons can be emitted in various ways, not solely dependent on the presence of empty electronic energy levels close to the ground state. IR photons are typically associated with changes in molecular vibrational or rotational energy levels rather than electronic energy levels.
IR spectroscopy, for example, focuses on the interaction of IR radiation with molecules. When molecules undergo vibrational or rotational transitions, they can emit or absorb IR photons. These transitions are related to changes in the kinetic and potential energy of atoms within the molecule as they vibrate or rotate.
Electronic transitions, on the other hand, are responsible for phenomena like ultraviolet (UV) or visible light absorption and emission. In these cases, electrons move between electronic energy levels, which are typically at higher energy levels than the ground state. So, the emission of IR photons is not directly tied to electronic energy levels close to the ground state.
In summary, IR photon emission is primarily associated with vibrational and rotational transitions in molecules, and it is not contingent on the presence of empty electronic energy levels close to the ground state.
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They existed before the dinosaurs.