final Flashcards
1
Q
Particles to moles
A
1 mole/ 6.02 * 10^23
2
Q
Percent Composition
A
- Find molar mass
- Multiply by subscript
- Divide the mass of one element by the total mass
- Multiply by 100
3
Q
Empirical Formula
A
Divide percentage of element by its molar mass
4
Q
Hydrates
A
- Subtract anhydrous mass from hydrate mass
- Convert both to moles (anhydrous & water)
- Find the ratio of moles of water to moles of anhydrous
- Write that number in front of H2O (ex. MgSO4*_H20)
5
Q
Percent Yield
A
Actual/theoretical * 100
6
Q
Triple point in graph
A
Exists in all three phases
7
Q
Critical point
A
Substance can’t exist as a liquid
8
Q
Boyle’s Law
A
P1V1=P2V2
9
Q
Charles Law
A
V1/T1=V2/T2
10
Q
Gay-Lussac’s Law
A
P1/T1=P2/T2
11
Q
Combined Gas Law
A
P1V1/T1=P2V2/T2
12
Q
Gibbs free energy
A
Negative is spontaneous
Positive is nonspontaneous
13
Q
Exothermic
A
Molecules collide with enough energy and produce products at a lower energy level
14
Q
Endothermic
A
Reactants lie at a low energy level and must absorb energy to overcome Ea
15
Q
Immiscible
A
Mixes together, then separates
