Flashcards in Equations Deck (32):

1

##
Number of neutrons

=

### Mass number - atomic number

2

## Amount (mol) =

### Mass of substance (g) / atomic mass (g/mol)

3

## Volume of gas =

### Amount (mol) x 24dm3

4

## Concentration of a solution =

### Amount of substance (mol) / volume (dm3)

5

## Percentage yield =

### Yield from reaction / maximum theoretical yield x 100

6

## Atom economy =

### Formula mass of desired product / sum of all formula mass of product x 100

7

## Rate of reaction =

### Amount of reactant used / time

8

## Retardation =

### Distance moved by substance / distance moved by solvent

9

## Magnification =

### Size of image / size of real object

10

## Weight =

### Mass x gravitational field strength

11

## Work done =

### Force x distance

12

## Force applied to a spring =

### Spring constant x extension

13

## Moment of a force =

### Force x distance

14

## Pressure

### Force / surface area

15

## Distance travelled =

### Speed x time

16

## Acceleration =

### Change in velocity / time taken

17

## Resultant force =

### Mass x acceleration

18

## Momentum =

### Mass x velocity

19

## Kinetic energy =

### 0.5 x mass x (speed)2

20

## Gravitational potential energy =

### Mass x gravitational field strength x height

21

## Power =

### Energy transferred / time

22

## Power =

### Work done / time

23

## Efficiency =

### Useful output energy transfer / useful input energy transfer

24

## Efficiency =

### Useful energy output / total energy output

25

## Wave speed =

### Frequency x wave length

26

## Charge flow =

### Current x time

27

## Potential difference =

### Current x resistance

28

## Power =

### Potential difference x current

29

## Power =

### (Current)2 x resistance

30

## Energy transferred =

### Power x time

31

## Energy transferred =

### Charge flow x potential difference

32