Flashcards in 5 - Formulae, Amounts Of Substance Deck (12)

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1

## What's avogadros constant?

### 6.02 x 10^23

2

## What is the R constant

### 8.314

3

## What is the ideal gas equation?

### PV = nRT

4

## Calculating moles?

### mass / rfm (molar mass)

5

## Moles/ rfm/ mass triangle?

### mass on top! moles and rfm on bottom

6

## Unit for pressure?

### Pascals (pa) 1kpa = 1000pa

7

## Unit for volume?

### m^3

8

## Converting from degrees centigrade to Kelvin?

### + 273

9

## Using empirical formula?

###
divide the mass by the rfm for all given elements

if the ratio is clear then leave it

if not divide by the smallest

work out the ratio

10

## Ionic equations?

###
break down all elements into their ions

cancel out ions either side of the equation

rewrite with what's left

11

## Gas triangle?

### volume on top, moles and 24 on bottom

12