Moles, Ar, Mr, all types Flashcards
(6 cards)
1
Q
How to work out Relative Formula Mass? (Mr)
A
Sum of RAM of atoms
2
Q
What is law of conservation of mass?
A
No atoms made or lost during chemical reaction
3
Q
Why might some reactions appear to show change in mass?
A
Product or reactant was a gas and not taken into account
4
Q
What is a mole?
A
Amount of a chemical substance
5
Q
What is avogadro’s constant?
A
6.02 x 10 to the power of 23
6
Q
What is the limiting reactant?
A
Reactant that is first used up.
