Law of Definite Proportions?

vera.g

New member
I need to state a hypothesis before I start this lab, but I don't have one...here's the information I'm given before I start my lab:

The law of definite proportions states that different samples of a pure compound always contain the same elements in the same proportions by mass. In this lab, a sample of potassium chlorate is thermally decomposed in order to determine the mass percent of oxygen in the compound.

what kind of hypothesis am I supposed to give based on this information??
 
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