Question

What is the empirical formula of a compound that contains $0.025$ mole of $Cd$, $0.05$ mole of $C$ and $0.10$ mole of $O$ ?

• A. $CdCO$
• B. $CdC{O}_2$
• C. $CdC{O}_3$
• D. $Cd{C}_2{O}_2$
• E. $Cd{C}_2{O}_4$

Answer 1

Answer: (E)

$Cd{C}_2{O}_4$

The compound that contains $0.025$ mole of $Cd$, $0.05$ mole of $C$ and $0.100$ mole of $O$.
The mole ratio $Cd:C:O$ is $0.025:0.05:0.10=1:2:4$
Hence, the empirical formula of the compound is $Cd{C}_2{O}_4$