3.1.2.2 The mole and the Avogadro constant Flashcards
1
Q
What is the value for Avogadro’s number?
A
6.022*10^23
2
Q
What is a mole?
A
One mole of any substance contains the same number of particles/ions/molecules etc as Avogadro’s number
3
Q
What is the mole (in terms of carbon)?
A
L is the number of C atoms in 12 grams of C12
4
Q
What is the formula for number of particles?
A
moles = (no. of particles)/Avogadro’s constant
5
Q
What is the formula for moles in terms of Mr?
A
moles = mass/ Mr
6
Q
What is true about atoms in a chemical reaction?
A
No atoms can be gained or lost
7
Q
What can be used to determine moles of unknown substances?
A
The coefficient/stoichiometry
8
Q
How to calculate moles in terms of conc.?
A
moles = conc. (moldm^-3)* volume(dm^3)
