Mole Flashcards
1
Q
What symbol represents relative atomic mass?
A
Ar
2
Q
what is avogadro’s number?
A
6.02 x 10^23
3
Q
What are the formulas to find mol?
A
mol = mass/mr mol = conc x vol
4
Q
What is the SI unit for molar mass?
A
g/mol
5
Q
What unit is used for volume?
A
dm^3
6
Q
Steps for empirical formula:
A
Step 1: List out the percentages
Step 2: List out the Mr
Step 3: Take the percentage divided by the Mr
step 4: Divide by the smallest ratio and round up
7
Q
Steps for molecular formula
A
Relative molecular mass / relative mass from empirical formula
8
Q
The volume of any gas at r.t.p. and pressure
A
24dm^3
9
Q
The formula for concentration in units g/dm^3
A
conc = mass/vol
10
Q
What is the SI unit used for concentration when finding mol?
A
mol/dm^3
