This page covers the following topics:
1. Balancing equations
A balanced equation is a model of a chemical reaction that shows the formulae of the reactants and the products. In order for an equation to be balanced, the number of atoms must be equal on both sides of the equation.
Ethane reacts with oxygen to produce carbon dioxide and water. Write the balanced equation for this reaction.
2C₂H₆ + 7O₂ → 4CO₂ + 6H₂O
Sodium chloride, also known as table salt, is formed by a reaction of sodium and chlorine. Write a balanced equation for this reaction.
2Na + Cl₂ → 2NaCl
The reaction of iron(III) oxide and hydrogen results in the formation of iron and water. What is the balanced equation for this reaction?
Fe₂O₃ + 3H₂ → 2Fe + 3H₂O
Balance the equation Zn + HCl → ZnCl₂ + H₂.
Zn + 2HCl → ZnCl₂ + H₂
Balance the equation S₈ + F₂ → SF₆.
S₈ + 24F₂ → 8SF₆
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