C4.2 - Equations and calculations

Question 1

What can you use when you want to know how much of each substance is involved in a chemical reaction?

Answer 1

When you want to know how much of each substance is involved in a chemical reaction, you can use the balanced symbol equation

Question 2

What happens when hydrogen molecules, H2, react with chlorine molecules, Cl2?

Answer 2

When hydrogen molecules, H2, react with chlorine molecules, Cl2, the reaction makes hydrogen chloride molecules, HCl:
H2 + Cl2 —> 2HCl

Question 3

H2 + Cl2 —> 2HCl.

The balanced equation tells you that one hydrogen molecule reacts with one chlorine molecule to make what?

Answer 3

The balanced equation tells you that one hydrogen molecule reacts with one chlorine molecule to make 2 hydrogen chloride molecules