Empirical & Molecular Formula (AQA A-Level Chemistry): Quizzes

Simplest whole-number ratio of atoms

$CH_2O$

Actual number of atoms of each element

Whole-number multiple of empirical

$n = \frac{M_r(\text{Molecular})}{M_r(\text{Empirical})}$

Convert masses to moles using $\frac{\text{Mass}}{A_r}$

$CH_2$

$C_6H_{12}O_6$

Multiply all values by 2

1:2:1