The thermal decomposition of potassium chlorate can be used

The thermal decomposition of potassium chlorate can be used to produce oxygen in the labratory:

2 KClO3 (s) ---> 2 KCl (s) + 3O2 (g)

What volume (in L) of O2 gas is produced by the decomposition of 7.5 g of KClO3 (s) at a tempterature of 25 deg C and a pressure of 1 atm?

A) 4.5 L B) 7.5 L C) 2.2 L D) 3.7 L E) 11 L

Solution

1 MOLE OF KCLO3=1.5 MOLES OF 02

7.5/122.55 MOLES OF KCLO3=0.091799 MOLES OF O2

VOLUME=0.091799*0.0821*298/1=2.24L OPTION C