The empirical formula of a compound is CH2Br. If the molar mass of the compound is 188. What will be it's molecular formula?
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To find out molecular formula we should find the factor first that is the ratio between molar mass and empirical formula mass .
empirical formula mass = 12+2+80 = 94 ( given )
n ( factor ) = 188 ÷ 94
= 2
Now we multiply factor into empirical formula
( CH2Br )2 = C2H4Br2 is molecular formula.
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