How oxygen is estimated in a given organic compound ?

Explanation

Estimation of oxygen : The given organic compound is decomposed by heating. The compound containing oxygen is treated with red hot coke and forms carbon monoxide. The mixture of `CO` is passed through warm jodine pentoxide. The `CO` is oxidised to `CO_2` and produce iodine. From `CO_2`, percentage of `O_2` can be calculated.
Calculations :
Let the mass of organic compound = mg
Mass of `CO_2 = m_1g`
44 g carbondioxide = 32 g of oxygen,
`m_1 g CO_2` contains - `(32 xx m_1)/(44) g " of O_2`
Hence, % age of oxygen = `(32 xx m_1 xx 100)/(44 xx m) %`