Unit 1
How many grams are in 5 moles of Calcium?
~200.39 g of Calcium
Would the bond between O2 be polar or nonpolar?
Nonpolar
Draw the lewis structure in the correct VSEPR shape for: O2 . Include bond angles.
will check answers (linear). 180 degrees.
Under what conditions do real gasses behave like ideal gasses?
What's the bond hybridization for water?
sp3
Atoms with the smallest atomic radii will be found where on the periodic table?
Up and to the right
Draw the Lewis structure for HF and include the dipole arrow.
Draw the lewis structure in the correct VSEPR shape for: NO2-. . Include bond angles.
will check answers (bent). 120 degrees.
What is meant by STP?
0 degrees Celsius or 273.15 K, and 1 atm
What's the bond hybridization for the central atom in BeCl2 ?
sp
Ionization energy increases in the periodic table...
As you go up a group and from left to right
Is it possible to have a polar trigonal planar molecule?
Yes if not all the terminal atoms are the same
Draw the lewis structure in the correct VSEPR shape for: PO4-3 . Include bond angles.
will check answers (tetrahedral). 109.5 degrees.
What's the concentration of a NaCl solution containing 5 moles of NaCl dissolved in 2 L of water?
2.5 mol / L or 2.5 M
What's the bond hybridization for NH3
sp3
What does ionization energy refer to?
Energy needed rip away a valence electron from an atom
Why is CO2 nonpolar but SO2 is polar?
The S has an extra lone pair which makes the shape bent.
What is meant by the phrase like dissolves like?
Nonpolar substances tend to dissolve nonpolar substances, and polar substances tend to dissolve polar substances.
Order these chemicals in terms of increasing IMF strength: CH4, C8H16OH, C8H18
CH4 < C8H18 < C8H17O
Draw the resonance structure for the following compound in the correct VSEPR shape: CO3-2
will check answers (trigonal planar)
What are the two factors in determining the strength of the attractive force between two charged particles in Coulomb's Law?
Distance and size of the charge
Why is water polar but carbon dioxide is not?
Water has a bent shape so the dipoles don't cancel each other out. Carbon is linear so the dipoles do cancel each other out.
How does microwave radiation affect matter?
Causes rotational motion
What are the IMFs present among C8H16OH molecules?
LDF, Dipole -Dipole, Dipole- induced dipole, H bonding. Basically everything.
*Daily Double* Draw the resonance structure for the following compound in the correct VSEPR shape and include the formal charges. SCN-
linear, S =0, C = 0, N=-1