Once a Chemical Formula is written in a Chemical Equation, what is the only thing that can be added?

Which of the following is a compound? a.carbon b.oxygen c.hydrogen d.water

The tilt of the earth's axis of rotation is responsible for the a) ocean's tides. b) size of the moon. c) brightness of stars. d) earth’s seasons.

Aroller coaster is traveling at 13 mi./s when you purchase a hill that is 400 m long and down the hill exonerate at 4.0 m/s squared what is the final velocity of the posterior found your answer to the nearest number