< A-level Chemistry < OCR (Salters)
| Constant | Symbol for constant | Value | Unit(s)* | Symbol for unit(s) |
|---|---|---|---|---|
| Avogadro's number | L | 6.02 × 1023 | mol−1 | reciprocal moles |
| Planck's constant | h | 6.63 × 10−34 | J Hz−1 | joules per hertz |
| speed of light | c | 3 × 108 | m s−1 | metres per second |
* Note that SI units are shown in bold
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