5. challenge: a chemical equation is balanced when each side of the equation includes the same number of each type of atom.

a. is the equation balanced as written? why or why not?

b. if you are familiar with balancing equations, balance the photosynthesis equation. write the balanced equation below.

A chemical equation is said to be balanced when the number of atoms of each element on the reactant side is equal to the number of atoms of those elements on the product side.

The process of photosynthesis involves carbon dioxide and water, which reacted together to form glucose and oxygen. The balanced equation for photosynthesis is given below:

6H2O + 6CO2 = C6H12O6 + 6O2.

Looking at this chemical equation, you will discover that: there are 12 atom of hydrogen, 18 atoms of oxygen and 6 atoms of carbon on both sides of the equation.

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.