Importance Values, Constants and Standards

The Gas Constant	R = 8.31 JK-1mol-1
The Faraday Constant	F = 9.65 × 104 Cmol-1
The Avogadro Constant	L = 6.02 × 1023 mol-1
The Planck Constant	h = 6.63× 10-34 Js
Speed of Light in a Vacuum	c = 3.00 × 108 ms-1
Mass of Proton	mp = 1.67 × 10-27 kg
Mass of Neutron	mn = 1.67 × 10-27 kg
Mass of Electron	me = 9.11 × 10-31 kg
Electronic Charge	e = -1.60 × 10-19 C
Molar Volume of Gas (where s.t.p. is expressed approximately as 101 KPa and 273 K (0℃))	Vm = 22.4 dm3mol-1 (at s.t.p.)
Ionic Product of Water	Kw = 1.00 × 10-14 mol2dm-6 (at 298K (25℃))
Specific Heat Capacity of Water	c = 4.18 kJkg-1K-1

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