write a chemical equation for the decomposition by heat of potassium chlorate to form oxygen and potassium chloride

Determine the number o moles of ions/atoms/particle in the following: 2.50 miles of k2s (let me know how to do)

The big bang nucleosynthesis theory states that elements were produced in the first few minutes of the big bang while elements have their origins in the interiors of stars, forming much later in the history of the universe.

How do you identify the anode on a power source such as a battery? how do you identify the cathode? how are terms anion and cation?