interactions between substances can produce chemical or physical changes which of the following describes a chemical change

A 2-kg bowling ball is 2.5 meter off the ground on a post when it falls just before it reachers the ground it is traveling 7 m/s. Assuming that there is no air resistance wich statement is true

Current of 250. a flows for 24.0 hours at an anode where the reaction occurring is as follows: mn2 + (aq) + 2h2o (l) → mno2 (s) + 4h + (aq) + 2e-what mass of mno2 is deposited at this anode?

Using your knowledge of the difference between the three different temperature scales, what do you think would happen if a human's body temperature were 98.

A solution has [oh-] = 2.3*10-2 m. use the ion product constant of water kw=[h3o+][oh-] to find the [h3o+] of the solution.

The music scale "do, re, mi, fa, so, la, ti, do" starts with a low sound and becomes higher with each note. What property of sound is changing when this happens?

Why do airbags fill evenly with gases?

In which of the following reactions will Kc = Kp? In which of the following reactions will Kc = Kp? (A) SO3 (g) + NO (g) ↔ SO2 (g) + NO2 (g) (B) 2 N2 (g) + O2 (g) ↔ 2 N2O (g) (C) 4 NH3 (g) + 3 O2 (g) ↔ 2 N2 (g) + 6 H2O (g) (D) 2 SO2 (g) + O2 (g) ↔ 2

Which tool is most suitable for a chemist to measure the mass of a liquid

What is the equation adheres to the law of conservation of matter

What ironic contrast does Vonnegut include in this scene? George tells his wife to forget sad things, but readers would expect George and Hazel to want to remember their son.