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Equations

In a chemical reaction, the substances that react together are called and the substances that are made are called .

Word equations

All reactions can be represented in , which must contain an arrow (鈫).

reactants 鈫 products

For example, when heated, green copper(II) carbonate decomposes into black copper(II) oxide and colourless carbon dioxide gas.

copper(II) carbonate 鈫 copper(II) oxide + carbon dioxide

Question

Nitrogen and hydrogen react together to form ammonia. Give the word equation for the reaction.