final Flashcards
Particles to moles
1 mole/ 6.02 * 10^23
Percent Composition
- Find molar mass
- Multiply by subscript
- Divide the mass of one element by the total mass
- Multiply by 100
Empirical Formula
Divide percentage of element by its molar mass
Hydrates
- 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)
Percent Yield
Actual/theoretical * 100
Triple point in graph
Exists in all three phases
Critical point
Substance can’t exist as a liquid
Boyle’s Law
P1V1=P2V2
Charles Law
V1/T1=V2/T2
Gay-Lussac’s Law
P1/T1=P2/T2
Combined Gas Law
P1V1/T1=P2V2/T2
Gibbs free energy
Negative is spontaneous
Positive is nonspontaneous
Exothermic
Molecules collide with enough energy and produce products at a lower energy level
Endothermic
Reactants lie at a low energy level and must absorb energy to overcome Ea
Immiscible
Mixes together, then separates
Miscible
Mixes together & stays
pH scale
- Measures how acidic or basic a substance is
- ranges from 0-14
Moles to Particles
6.02 * 10^23/1 mole