GeoChem Challenge #5 - Something Must Break Mystery Cache

The cache is not at the posted coordinates.

This is the final and last geocache of the GeoChem series, this time the goal is to balance some chemical reactions. This puzzle cache must be solved using knowledge of chemistry applying stoichiometry principles.

Stoichiometry is often used to balance chemical equations. In stoichiometric compounds, the molar proportions are whole numbers (that is what the law of definite proportions is about). The numbers used to balance the equation are called coefficients.
If there is no number in front of a substance, the coefficient for that substance is 1.
You can learn more at Wikipedia.

The next step is a logic puzzle in which cells in a grid have to be filled or left blank according to numbers given at the side of the grid to reveal a hidden picture.
There are only two rules:
1-The numbers in the rows and columns tell how many filled squares are in each row and column.
2-There is always at least one empty square separating the groups of filled squares.

Solving the following puzzle will give you what you need to find the cache.