Is biting an apple a physical or chemical change?

Select the correct answer. In the graph, what effect would adding a catalyst have on D? A. It would decrease. B. It would increase. C. It would stay the same. D. You cannot tell from this graph.

When ethane burns, it produces carbon dioxide and water: 2C2H6 (g) + 7O2 (g) - --> 4CO2 (g) + 6H2) (I) How many molecules of water will be produced when 3 moles of ethane are burned

Which best describes nuclear fusion? A. It produces heavier elements. B. It creates abundant radioactive material. C. It causes the collision of alpha particles. D. It transforms energy into mass.

Electrolysis is the flow of electric current through an electrolyte A. to cause a nonspontaneous acid-base reaction. B. to cause a nonspontaneous redox reaction. C. as a result of a spontaneous acid-base reaction. D.

Which of the following groups contain three elements with stable electron configurations? a. lithium, krypton, argon b. argon, neon, barium c. xenon, neon, boron d. helium, xenon, neon

c. When we heat water up by the Bunsen burner, what temperature is the boiling water? After 10 minutes

Assuming that air contains 78 percent N2, 21 percent O2 and 1 percent Ar, all by volume. How many molecules of each type of gas are present in 1.0 L of air at STP?

Two children are playing tag. Child A who is doing the chasing can run 100m in 24 seconds Child B is running away from child A and can run 64m in 21 seconds.

What ion does a base increase

What is the definition of Amplitude?