Equations Flashcards
Number of neutrons
=
Mass number - atomic number
Amount (mol) =
Mass of substance (g) / atomic mass (g/mol)
Volume of gas =
Amount (mol) x 24dm3
Concentration of a solution =
Amount of substance (mol) / volume (dm3)
Percentage yield =
Yield from reaction / maximum theoretical yield x 100
Atom economy =
Formula mass of desired product / sum of all formula mass of product x 100
Rate of reaction =
Amount of reactant used / time
Retardation =
Distance moved by substance / distance moved by solvent
Magnification =
Size of image / size of real object
Weight =
Mass x gravitational field strength
Work done =
Force x distance
Force applied to a spring =
Spring constant x extension
Moment of a force =
Force x distance
Pressure
Force / surface area
Distance travelled =
Speed x time
Acceleration =
Change in velocity / time taken
Resultant force =
Mass x acceleration
Momentum =
Mass x velocity
Kinetic energy =
0.5 x mass x (speed)2
Gravitational potential energy =
Mass x gravitational field strength x height
Power =
Energy transferred / time
Power =
Work done / time
Efficiency =
Useful output energy transfer / useful input energy transfer
Efficiency =
Useful energy output / total energy output
