Physical Constants

Some Unit Conversions

1 in. = 2.54 cm
1 mi. = 1.61 km

1 m³ = 1000 L
1 cm³ = 1 mL
1 L = 1.06 Qt

1 lb = 454 g
1 Oz = 28.4 g

1 torr = 1 mm Hg
1 atm. = 760 mm Hg

1 cal = 4.18 J
1 Cal = 1 kcal [Nutritional Calorie]

Some Physical Constants

Avogadro's Number
N_A = 6.02x10²³ mol^-1

^{The Gas
Constant}
R = 0.082 L-atm/mol-K [Liter-Atm. units]
R = 8.31 J/mol-K [SI Units]

Planck's Constant
h = 6.63x10^-34 J-s

Speed of Light
c = 3.00x10⁸ m/s