Honors Chem help. I’m trying to see where I went wrong. Thank you for any help

Layers of rock containing fossils, like the layers illustrated here, are most likely composed of rocks.

What’s the percent by mass of carbon in c10h14n2

Clyde and marilyn are riding a roller coaster. during which section(s) of the track is their potential energy converted to kinetic energy? a. from point b to point c only b. from point b to point d only c. from point a to point b only d. from point a to point b and from point c to point d