3.1.2 - Amount Of A Substance Flashcards
1
Q
ATOM ECONOMY =
A
Mr of wanted product/total mr of reactants x 100
2
Q
What is the ideal gas equation?
A
pV = nRT
3
Q
P = ?
A
Pressure (Pa)
4
Q
V = ?
A
Volume (m^3)
5
Q
R = ?
A
8.31
6
Q
T = ?
A
Temperature (K)
7
Q
How do you get from °C to K?
A
+ 273
8
Q
How do you get from cm3 to m3
A
Divide by a million
9
Q
How do you get from KPa to Pa?
A
x 1000
10
Q
How do you get from cm3 to dm3 ?
A
Divide by 1000
11
Q
No. of particles = ?
A
Avagadros number x no. Of mol
12
Q
What’s the importance of percentage yield
A
To get as much product as possible because in chemical reactions not all of the reactants actually react
13
Q
How do you calculate density
A
Mass/volume
14
Q
What’s the importance of atom economy
A
To maximise the mass of reactants that end up in the desired product
15
Q
How to work out limiting reagent when there’s not a 1:1 ratio in equation
A
- calculate 1 mole of both.
E.g if 1:2 ratio then divide the one with 2 moles by 2 - then compare which one is in excess
