URGENT!... Hey guys i need help with this question please

Why are there more earthquakes in California than Tennessee?

A. There is more plate movement in Tennessee.

B. California is breaking off to fall into the ocean.

C. There is more plate movement in California.

Diffraction is when light is bent around obstructions. which of the these observation about clouds would indicate diffraction? a) after rain storms, you can sometimes see rainbows. b) clouds are white or gray and cannot be seen through. c) on a cloudy day, the temperature tends to be cooler than a sunny day. d) the edges of dark clouds appear lighter. this

Stoichiometry- i need with 14 and 15! an explanation would be appreciated!

Asolution of naoh has a concentration of 25.00% by mass. what mass of naoh is present in 0.250 g of this solution? use the periodic table in the toolbar if needed. 0.0625 g what mass of naoh must be added to the solution to increase the concentration to 30.00% by mass? g