National 5 Balanced equations Calculating percentage composition Chemical equations must be balanced so that the quantities of reactants and products match. For an equation to be balanced there ...

An tanker truck carrying liquid sodium hydroxide spilled 50 gallons of the caustic chemical onto the eastbound lanes of Interstate 10 at Williams Boulevard in Kenner on Thursday, May 12, 2022.

The spill at Sydney’s Australian Nuclear Science and Technology Organisation facility was of a household cleaning chemical that can be dangerous if it makes contact with the skin.

Learn about and revise calculations in chemistry for Higher tier students with this BBC Bitesize GCSE Chemistry (AQA) study guide.