| Author | Message | ||
     唔駛做魚la^^"~Michael Username: 981087 Registered: 04-2003 |
如題... 在past paper見到呢個字 | ||
| Chio U Kim Username: cuk Registered: 04-2003 |
An empirical formula is a chemical formula that shows the simplest whole number ratio of the atoms of the constituent elements. E.g. Glucose The molecular formula is C6H12O6 The empirical formula is CH2O Water Both the molecular and empirical formulae are H2O Sodium chloride* The empirical formula is NaCl * Giant ionic structures are always represented by empirical formulae because there are no individual molecules. Silicon dioxide exists as a giant covalent structure and is thus represented by the empirical formula SiO2 Carbon dioxide exists as discrete molecules. Both the molecular and empirical formulae are CO2. Empirical formulae (實驗式)are so called because they are derived from experiments. | ||
| 唔駛做魚la^^"~Michael Username: 981087 Registered: 04-2003 |
ic thx |