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Question: > Calculate the molecular formula of compound which contains 20% Ca and 80% Br (by wt.) if molecular...

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)

A

Ca1/2Br

B

CaBr2

C

CaBr

D

Ca2Br

Answer

CaBr2

Explanation

Solution

(2)

Hence : Empirical formula = CaBr2

n =200200=1= \frac{200}{200} = 1

Hence : Molecular formula = CaBr2