A-level Chemistry/OCR (Salters)/Constants

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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