Things to know Flashcards
Name the diatomic atoms
Bromine Iodine Nitrogen Chorine Hydrogen Oxygen Fluoride
n=N/L
number of moles = number of particles/ Avogadro’s constant
Describe reactivity trends in group 1 and group 7.
reactivity increases DOWN group 1
Reactivity increases UP group 7
What is a group?
Vertical columns.
What is a period?
The rows.
How to find empirical formula?
- Find mass of each element
- Determine number of moles for each element
- Divide each by the smallest number of moles
The number of atoms must be the ______ on both sides of the equation.
SAME (aka balance the equation or die)
What is the equation for the percentage yield?
[Experimental (observed) / theoretical (given)] x 100%
Convert 0 degrees celsius to kelvins.
273 K
What process changes solid to gas and vice versa?
Sublimation/reverse sublimation
What process changes gas to liquid and vice versa?
condensation/ boiling or evaporation
What is STP?
273 k, 100kPa
What is RTP?
298 k (room temp), 100kPa
All gases have the same ______ at the same temperature and pressure.
molar volume
At RTP the molar volume of a gas is?
24 dm^3
At STP the molar volume of a gas is?
22,400 cm^3
Given a gas, what is the equation to find the number of moles?
Actual Volume / Molar Volume (either 22,400 cm or 24 dm)
Describe the relationship between pressure and volume (given all other factors remain constant).
It’s inversely proportional. An increase in volume reduces pressure.
Temperature vs Pressure
The pressure is proportional to the absolute temperature measured in kelvin. (given everything else is constant)
Under which conditions does a real gas behave most nearly like an ideal gas?
Low pressure and high temperature
The atomic number of any atom is equal to the number of:
protons in the atom, only
