A sample consisting of potassium chlorate and an inert material

[priscilla98]

Homework Statement

A sample consisting of potassium chlorate and an inert material is intensely heated. The weight loss observed is 20.0 %. What percentage of the sample is inert material?

2. The attempt at a solution

I know when you heat potassium chlorate and another material, the mass would be more than the mass of the potassium chlorate and another material before heating. That's why I'm confused to the weight loss in this problem. Would you use an equation to solve this problem? I'm a little stuck on this question.

 

[priscilla98]

Homework Statement

A sample consisting of potassium chlorate and an inert material is intensely heated. The weight loss observed is 20.0 %. What percentage of the sample is inert material?

2. The attempt at a solution

I know when you heat potassium chlorate and another material, the mass would be more than the mass of the potassium chlorate and another material before heating. That's why I'm confused to the weight loss in this problem. Would you use an equation to solve this problem? I'm a little stuck on this question.

Would you use percent composition?

 

[Borek]

What happens to roasted potassium chlorate?

 

[priscilla98]

with manganese oxide, potassium chlorate turns to potassium chloride

 

[Borek]

Close, but not there yet. Try to write balanced reaction equation.