bonding
A chemical bond between atoms results from the attraction between electrons and
protons
How many moles are in 25 grams of water?
1.39
What is the name of the element with atomic #6?
carbon
barium bromide (BaBr2)
soluable
Solvent
a substance—usually a liquid—that dissolves a solute (a solid, liquid, or gas) to form a homogeneous mixture known as a solution.
A covalent bond consists of
a shared electron
How many grams are in 4.5 moles of Li2₂O?
134.46 grams
Calcium is a member of which element family?
alkaline earth metals
sodium thiocyanate (NaSCN)
soluble
Solution
a homogeneous mixture of two or more substances, typically composed of a minor component (solute) dissolved in a major component (solvent)
. If two covalently bonded atoms are identical, the bond is identified as
nonpolar covalent
How many grams are in 8.2 x 1022 molecules of N₂l?
107.5 grams
What is the element symbol for krypton?
Kr
copper (II) sulfide (CuS)
insoluble
heterogeneous mixture
a combination of two or more substances that is not uniform throughout, featuring distinct, physically separable phases
Which of the following intermolecular forces are the strongest?
a) London Dispersion Forces
b) Hydrogen Bonding
c) dipole-dipole
d) ionic
b)
How many molecules are in 25 grams of NH3?
8.84x1023
Name a all of the halogen
fluorine, chlorine, bromine, iodine, and astatine
How many grams of NH4Cl will dissolve in 100 grams of 90°C Water?
71 -72 grams
homogeneous mixture
a solid, liquid, or gaseous mixture that has the same uniform composition and appearance throughout
The pair of elements that forms a bond with the least ionic character is
a) Na and Cl
b) H and Cl
c) O and Cl
d) Br and Cl
d)
How many moles are in 3.4 x 1023 molecules of H2SO4?
0.56 moles
What subatomic particles are in the isotope Cu2971 ?
Protons - 29
Electrons - 29
Neutrons - 42
You start with a saturated solution of NH3 in 100 grams of water at 10°C. How many grams of NH3 gas would bubble out of the solution if you raise the temperature to 80°C?
56 grams
Chemical compound
a substance formed when two or more different elements chemically bond together in fixed ratios,