Chemical Formulae (Leaving Cert Chemistry): Quizzes

The simplest ratio of atoms

$H_2O_2$

Convert % to grams (assume 100 g)

Divide by atomic mass

$CH_2O$

30 g/mol

$C_6H_{12}O_6$

$\frac{\text{element mass}}{\text{molar mass}} \times 100$

11.11%

Arrangement and bonding of atoms

$C_6H_{12}O_6$