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ChemistryMole ConceptEmpirical and Molecular FormulaMedium2 minQB

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Calculate the molecular formula of compound which contains $20% Ca$ and $80% Br$ (by wt.) if molecular weight of compound is 200 . (Atomic wt. $Ca = 40, Br = 80$ )

Options:

Answer:

Solution:

Elements $%$ $%$ / Atomic mass Simple ratio Simplest whole no.

Ca 20 $20/40 = 0.5$ 1 1

Br 80 $80/80 = 1$ 2 2

Hence : Empirical formula $= CaBr_{2}$

Hence : Molecular formula $= CaBr_{2}$

$n = \frac{200}{200} = 1$

Stream:JEESubject:ChemistryTopic:Mole ConceptSubtopic:Empirical and Molecular Formula

⏱ 2mℹ️ Source: QB

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