Unit 1
1 mole = ??? Formula Units
6.022 x 1023
What element has the most electronegativity?
Fluorine
What is the formula of the Ideal Gas Law?
PV=nRT
Physical change doesn't change the chemical formulas.
If we have rate=k[X]2[Y], what is the overall rate?
3
1s2 2s2 2p5 is what neutral element?
Fluorine
True or False
In covalent bonding, one atom transfers electrons to the other atom.
False. Covalent Bonds shares electrons.
What is the IMF that every single molecule has?
London Dispersion Forces
Oxidation .... electrons.
Reduction .... electrons.
1. loses
2. gains
What has more surface area, A piece of an element or powdered sample?
Powdered sample
When the atomic radii increases in the periodic table...
What happens to the attraction of the valence electrons?
It decreases
What is the bond angle of NH3?
109.5 degrees
Hydrogen bonding is when hydrogen are attraction to what elements.
Oxygen, Nitrogen, and Fluorine
True or False
An acid forms a conjugate base by gaining a Hydrogen.
False, it loses it.
What is the equation that relates k value and half life for a first order reaction?
t1/2 = (0.693)/k
Which shell or orbitals will have the most binding energy?
The one closest to the nucleus (1s)
What are formal charges?
A charge on an atom in a molecule if all bonding electrons were shared equally.
How do we tell if a ion are good conductors of electricity?
If the cation and the anion are moving freely.
What is Brønsted-Lowry base?
When it accepts a Hydrogen.
If we have rate=k[CH3I][NaOH], what will happen to the concentration when CH3I and NaOH is doubled?
The concentration will increase by a factor of 4
Explain why the first ionization energy of K is less than that of Ca?
The valence electron of K experiences a lower effective nuclear charge than the valence electrons of Ca
What is the electronegativity difference that can determine what molecules are polar?
0.5 or higher.
What should we determine to have the strongest ion-dipole attracted to water?
The largest charge to size ratio.
A student measures 100.0 mL of 0.500 M NaOH solution, then dilutes the solution with 150.0 mL of water. This was titrated with HCl, and 60.0 ml was required to reach the equivalence point. What was the concentration of the HCl?
0.833 M
Step 1: A + B --> C (Slow)
Step 2: C + B --> D (Fast)
Step 3: D --> C + 2B (Fast)
Which letter are the intermediates and catalyst?
Intermediates: C and D
Catalyst: B