Flashcards in DJA1). Amount If Substance Deck (29):

1

## Relative molecular mass / Mr

### The mass of that molecule compared to 1/12 the number relative atomic mass of carbon 12

2

## Avogadro's constant definition

### The number of particles (atoms, ions, molecules, electrons etc...) in 1 mile of substance

3

## Avogadro's constant symbol and number

### L= 6.022x10^23 particles (don't need to know number)

4

## Number of particles in x number of miles of substance y.....

### number = moles times L (Avogadro's constant)

5

## Limiting reagent=

### Substance with least number of moles

6

## Uncertainty = (number and %)

###
Half the smallest division

%= uncertainty divided by measurement x100

Must calculate all uncertainties in percentages then add them all together to get total percentage uncertainty

7

## Ideal gas equation

### PV=nRT

8

##
IDGE

P=

###
Pressure (Pa)

9

## V

### Volume (m^3)

10

## n

### Moles

11

## R

### Gas constant (Jmol^-1K^-1)

12

## T

### Temperature (K)

13

## KPa -Pa

### x1000

14

## MPa-Pa

### x1000000

15

## dm^3 - m^3

### /1000

16

## cm^3 -m^3

### /1000000

17

## Degrees - kelvin

### Degrees + 273

18

## 1 atm =

### 101000Pa

19

## Gas constant=

### 8.31 Jmol^-1K^-1

20

## Ideal gas has what type of particles

###
Point like

So when they collide no energy is lost

21

## Molecular formula

### The actual number of atoms of each element in a molecule

22

## Empirical formula

### The simples whole number ratio of atoms of each element in a compound

23

## atom economy =

### Mr of wanted product divided by Mr of products x 100

24

## To find molecular from empirical

### Empirical x Mr / formula mass of empirical

25

## RFM/ Ar definition

### The weighted average mass of an atom of an element taking into account all its naturally occurring isotopes relative to 1/12 the relative atomic mass of carbon 12

26

## a

### a

27

## a

### a

28

## b

### b

29