Calculations🧮 Flashcards
1
Q
formula for mass
A
Mass (m) = Moles (n) * Molar mass (Mr)
2
Q
Avogadro’s constant/ number
A
6.02*10^23
3
Q
formula for number of particles (N)
A
N = moles (n) * NA
4
Q
Atom economy
A
%atom economy =
Mr of desired product/
Mr of all reactants. *100
5
Q
formula for volume (gas equation) at SLC
A
Volume (V) = moles (n) * VM (24.8)
6
Q
Molar Volume (VM)
A
- 8L
* one mole of any gas occupies 24.8L
7
Q
Formula for concentration
A
Concentration = moles (n) /
Volume (V)
8
Q
Ideal gas law
A
PV = nRT
P= pressure in kpa V= volume in L n= moles R= gas constant 8.31Jmol^-1 T= temp in kelvin
9
Q
Conversion of gas units
kpa-mmHg-atm
A
100kpa = 750mmHg = 0.987 atm
10
Q
Standard temperature / pressure (STP)
A
0• or 273K and 100.0 kPa.
•The molar gas volume at STP is 22.7 Lmol-1.
11
Q
Standard laboratory conditions (SLC)
A
25•C or 298K and 100kpa
molar volume is 24.8
12
Q
Charles’ law
A
V1 / T1 = V2 / T2 V1 = first volume V2 = second volume T1 = first temperature T2 = second temperature
13
Q
Boyles law
A
P1V1 = P2V2
P1= first pressure V1= first volume P2= second pressure V2= second volume
