Chemical calculations with mass Flashcards
1
Q
What is the conservation of mass?
A
Atoms cannot be created or destroyed in a chemical reaction.
2
Q
Why is some mass lost in a reaction?
A
Some is lost to surroundings.
3
Q
Why can some reactions increase in mass?
A
Usually because a gas is added to the reaction.
4
Q
What are the state symbols for:
* Solid
* Liquid
* Gas
* Aqeous or dissolved in water
A
- (S)
- (L)
- (G)
- (AQ)
5
Q
What is the formula mass?
A
Sum of relative mass of all the atoms in the formula.
6
Q
What is avogrado’s constant?
A
6.02 x 10 to the 23
7
Q
Moles =
A
Mass / Mr
8
Q
How do you calculate the concentration (g/dm³)
A
Mass (G) / Volume (dm³)
