Question

(C6H6) can be biodegraded by microorganism. if 30 mg of benzene is present, what amount of oxygen required for biodegradation, no new cells are formed?

Answer 1

36.92 mg of oxygen required for bio-degradation.

Step-by-step explanation:

`5C_6H_6+15O_2\rightarrow 12CO_2+15H_2O`

Mass of benzene = 30 mg = 0.03 g (1000 mg = 1 g )

Moles benzene =
`(0.03 g)/(78 g/mol)=0.0003846 mol`

According to reaction 5 moles of benzene reacts with 15 moles of oxygen gas.

Then 0.0003846 mol of benzene will react with:

`(15)/(5)* 0.0003846 mol=0.0011538 mol` of oxygen gas

Mass of 0.0011538 moles of oxygen gas:

0.0011538 mol × 32 g/mol = 0.03692 g = 36.92 mg

36.92 mg of oxygen required for bio-degradation.