Question

A 3.0 mole sample of KCIO3 was decomposed according to the equation:

2KCIO3(s) ===> 2KCI(s) + 3O2(g)
How many moles of oxygen (O2) will be formed?
o 2.5 moles
4.0 moles
3.0 moles
2.0 moles
4.5 moles

Answer 1

4.5 moles

Step-by-step explanation:

From the equation, the mole ratio of KClO3: O2 = 2: 3

Which means, every 2 moles of KClO3 forms 3 moles of O2.

Let the no. of moles of O2 formed be y.

`(2)/(3) = (3.0)/(y)`

2y = 3x3

2y = 9

y = 4.5 moles