What must you add to balance a half-reaction in an acidic solution?
A. Just add oxygen molecules to balance the equation.

B. Just add water molecules to balance the equation.

C. Just add hydrogen ions and water molecules to balance the equation.

D. Just add hydroxide ions and water molecules to balance the equation.

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

Which type of fossil does this image depict?

What occurs when a cell engulfs large food particals