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Explain why the percent composition of certain compounds are not sufficient to determine the compounds molecular formulas?
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Answered 2012-02-20 22:51:51
Because unlike the empirical formula, the molecular formula does not have to be the simplest ratio.
If by chance you are given the percent composition of the elements in a substance, you could calculate the empirical formula and then the empirical formula's mass. However, the molecular formula equation is molecular formula= (empirical formula)n, where n is the mass of the molecular formula divided by the mass of the empirical formula. You would, therefore, need to know the mass belonging to the molecular formula, which you are not given.
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What does compounds molecular formula tells what?
Molecular formula of a chemical substance is representative for the composition of this chemical substance.
Can you determine the molecular formula of a substance from its percent composition?
Not completely. The empirical formula of a substance can be determined from its percent composition, but a determination of molecular weight is needed to decide which multiple of the empirical formula represents the molecular formula.
It is possible to determine the molecular formula of a substance from its percentage composition?
From the percentage composition only, an empirical formula can be derived, but a proper molecular formula can only be assured by adding some information about the molecular weight of the substance concerned.
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I dont know thats why im asking >_>
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simple molecular compounds have weak forces of atraction.
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the relationship between prefixes and molecular compounds is that, prefix are used to name molecular compounds.
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When molecular compounds bond, they share electrons.
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Correct, molecular Compounds have covalent bond.
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Because there are no compounds that aren't molecules/molecular. The question as posed is nonsense. Rephrase?
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