Finals Flashcards
(46 cards)
Electro negativity
The ability to attract electrons
Covalent bond in which the shared electron pair comes from only 1 of the atoms
Coordinate covalent bond
Covalent bond between two atoms of significantly different electronegativities
Polar bond
Type of bond that is very important in determining the properties of water and of important biological molecules (proteins and DNA)
Hydrogen bond
The number of grams of an element that is numerically equal to the atomic mass of the element in amu
Atomic mass
The volume occupied by a mole of any gas at STP
Molar volume
The number of representative particles of a substance present in 1 mile of that substance
Avogadro’s number (6.022*10^23)
An atom ion or molecule
Representative particle
0• C and 1 atm
STP
Percent by mass of each element in a compound
Percent composition
Smallest whole number ratio of atoms in a compound
Empirical formula
Combustion reaction
Reactant: oxygen gas
Product: carbon dioxide and water
Actual yield/theoretical yield*100
Percent yield
Characteristic of ionic compound
High melting point
How do atoms achieve noble gas configurations in single covalent bonds?
Two atoms share two electrons
According to the VESPAR theory, molecules adjust their shapes to keep which of the following as far apart as possible?
Pairs of valence electrons
What causes water molecules to have a bent shape?
Repulsive forces between unshared pairs of electrons
Weakest molecular attraction
Strongest
Dispersion
Hydrogen
How many liters are in a mole?
22.41 L
How to find the density at STP of a gas?
Molecular weight/22.41 liters per mole
G/mole
To find empirical formula…
Divide percent by molecular weight
Divided all by smallest number
Double replacement reaction
Two ionic compounds
How to figure out if single replacement reactions can take place
Activity series of metals (has to be higher above to replace it)
Example of a driving force of a reaction
Precipitate is formed
