AQA GCSE Combined Science Trilogy · 8464
Specification 5.1.1.1, 5.3.1.1, 5.3.2.2, 5.3.2.3 · Paper 3
A number placed before a chemical formula in an equation that multiplies the whole formula.
Revise: Representing Chemical Reactions and Balancing EquationsTo balance an equation, change the coefficients: the numbers placed in front of whole formulae. A coefficient multiplies every atom in that formula.
- Revise: Conservation of Mass and Balanced Equations
A number written in normal script before a chemical formula that multiplies the entire formula.
- Revise: Amounts of Substances in Equations
The number written before a chemical formula in a balanced equation. It shows the relative amount of that substance; an unwritten coefficient is 1.
1 more note
- Revise: Using Moles to Balance Equations
The number written in front of a chemical formula in an equation. It gives the relative number of particles, and therefore the relative amount in moles, of that substance.