Be able to do the calculations above for a weak base + strong acid problem. For example, what is the pH at the equivalence point for the titration of a 25.0mL sample of 0.175M CH3NH2 with 0.150M HBr (Kb = 4.4 x 10-4)?

Frictional forces acting on an object are often converted into energy, which causes the temperature of the object to rise slightly.

An electron moved from shell n = 2 to shell n = 1. what most likely happened during the transition? a fraction of a photon was added. a photon of energy was absorbed. a fraction of a photon was removed. a photon of energy was released.

How does the atmosphere to make earth livable? check all that apply. causes the seasons contains oxygen provides warmth creates important nutrients blocks harmful energy from the sun plz like !