Things I Didn't Know Flashcards
1
Q
What is an open system? (3)
A
- Reactions in open container
- Gas can escape to atmosphere
- Liq’s can evaporate
2
Q
What is a closed system? (2)
A
- Reactions in closed container
2. Particles cannot escape
3
Q
Why might a mass change occur in an open system?
A
Gases in air can interact w reactants
4
Q
What can limit a reaction?
A
The reactant we have the least amount of
5
Q
What is the relative formula mass of an element based on?
A
Mass of carbon 12
6
Q
“One mole contains the…”
A
Same number of particles as there atoms in 12g of carbon 12
7
Q
What is stoichiometry?
A
Balancing equations
