A reaction of heating potassium permanganate produces potassium manganate, manganese dioxide and oxygen gas.
Heat 15.8 g potassium permanganate until no more oxygen gas
is given off. The remaining material has a mass of 14.2 g. What
mass of oxygen gas was produced in the reaction?
g

I noticed that its ur first question probably meaning u just came to so ima warn you that if any one ever answers with "the answer is in this file" DONT OPEN IT its either a virus or something nasty

OH yeah n

and mostly u wont get right answer on by my experience

Explanation:

what is the average time it took the car to travel 0.25 meters?

⇒ 2.23 seconds

what is the average time it took the car to travel 0.50 meters?

⇒ 3.13 seconds

the right answer is c i just did the question.