1.

A compound contains 4.07% hydrogen, 24.27% carbon and 71.65% chlorine. Its molar mass is 98.96g. What are its emirical and molecular formulas?

Answer»

Solution :To calculate the empirical formula

Hence, the empirical formula of the compound is `CH_(2)Cl`
Step 2. CALCULATION of empirical formula mass
E.F. mass of `CH_(2)Cl=12+2xx1+35.5=49.5`
Step 3. Calculation of VALUE of n
`n=("Molecular mass")/("E.F. mass")=(98.96)/(49.5)=2`
Step 4. Calculation of molecular formula
Molecular formula `=nxxE.F. = 2XX(CH_(2)Cl)=C_(2)H_(4)Cl_(2)`


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