Stoichiometry
The chemical recipe

Carbon atom
+
Oxygen molecule
Carbon dioxide molecule

Just like a food recipe, the equation above tells us how to make a molecule of carbon dioxide. According to the equation(recipe) above one molecule of oxygen reacts with one atom of carbon to produce one molecule of carbon dioxide. Complete the exercises below by desribing what he equation is represetning. Fill in the column on the right.

zinc atom
+
2hydrochloric acid
zinc chloride
+
hydrogen molecule

The equation on the left tells us that when one atom of zinc reacts with 2 molecules of hydrochloric acid (HCl), one unit of zinc chloride and one hydrogen molecule are produced.

+
2
+

 

 

+
2
+
2

 

 

2
+
7
4
+
6

 

 

2
+
2

 

 

Describe the equations (recipes) above in the space provided on the right.

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