Try it on paper first. A hint, the key idea and the worked solution are here when you need them.
Name the reactants and the products in each, and write the word equation.
A chemical equation shows the reactants on the left and the products on the right. State symbols: solid, liquid, gas, dissolved in water. Gases such as oxygen, hydrogen and chlorine are written as , , . A number after a bracket multiplies everything inside it.
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Step 1. (a) Reactants: magnesium and oxygen. Product: magnesium oxide. magnesium + oxygen magnesium oxide.
Step 2. (b) Reactants: zinc and hydrochloric acid. Products: zinc chloride and hydrogen. zinc + hydrochloric acid zinc chloride + hydrogen.
Answer: as above.
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