Aqueous solutions of potassium permanganate, KMnO4(aq), are easily recognized by their deep purple color. When potassium permanganate is added to an acidified solution of hydrogen peroxide, H2O2(aq), the color immediately disappears, leaving an almost colorless solution
The addition of KMnO4(aq) to a solution of oxalic acid, H2C204(aq), likewise produces a colorless solution but may take several minutes
Which of the following offers the BEST suggestion for a way to speed up the reaction between oxalic acid and potassium permanganate?

The earth's moon is unusually large. two popular theories of the moon's origin include the "sister world" hypothesis, which states that the moon formed from the same materials as the earth, near enough to the earth that they fell into orbit around each other. a second theory is the "capture" hypothesis, in which the moon formed elsewhere in the solar system, and the earth's gravity pulled it into its orbit. studies of what the moon is made of indicate that some of its materials had to come from the earth or from the same area of the solar system where the earth had formed. at the same time, the moon does not contain much of the material that makes up the earth's core, so the moon could not have formed from the same materials as the earth. how do the two facts above affect the described theories of the moon's origin? a. they show that scientists will never agree on where the moon came from. b. they show that more experiments on moon formation need to be done. c. they show that no theory accounts for the existence of the moon. d. they show that neither theory is complete and entirely correct.

What effect might melting sea ice have for people who live in coastal areas?

Chemical energy is a form of a. kinetic energy only. b. both potential and kinetic energy. c. neither potential nor kinetic energy. d. potential energy only. reset