Gen Chem Quicksheets

Question 1

What is the energy of an electron formula?

Answer 1

E = -Rh / n² E = energy of an electron (joules) n = principle quantum number

Question 2

What is the electromagnetic energy of photons equation?

Answer 2

E = hc / λ E = energy of photons (joules) h = planck’s constant c = speed of light 3E8m/s λ = wavelength in (meters)

Question 3

What is the principle quantum number (n)?

Answer 3

The shell

Question 4

Relate the principle quantum number(n) to energy and radius

Answer 4

high n = high energy = high radius

Question 5

What are the quantum numbers 1-4?

Answer 5

n l m(l) m(s)

Question 6

What is the azimuthal quantum number?

Answer 6

Subshells 0,1,2,3 or s,p,d,f

Question 7

What is the max number of electrons that can exist in subshell (l)?

Answer 7

4l + 2

Question 8

Whats the maximum number of electrons in principle quantum number (n) ?

Answer 8

2n²

Question 9

What is m(l)?

Answer 9

the magnetic quantum number, specifies the particular orbital within a subshell.

Question 10

What are possible m(l) values?

Answer 10

-l to l

Question 11

What is hund’s rule?

Answer 11

In subshells orbitals are filled with single parallel spins (single) first

Question 12

Zn + CuSO4 -> Cu + ZnSO4 Is an example of what kind of reaction?

Answer 12

Single-displacement reaction

Question 13

CaCl2 + 2 AgNO3 -> Ca(NO3)2 + 2 AgCl is an example of what kind of reaction?

Answer 13

double-displacement reaction

Question 14

What is a net ionic equation?

Answer 14

An equation that shows only the participants of the equation and not the spectators

Question 15

What kind of system is a human like?

Answer 15

An open system

Question 16

What is the bond dissociation energy?

Answer 16

average of energy required to break a particular type of bond

Question 17

Real gases deviate by what three variables?

Answer 17

Volume Pressure Temperature

Question 18

What change in volume causes a gas to behave less ideally?

Answer 18

decreasing the volume Because this puts the gases in closer proximity - more interactions

Question 19

Pressure causes what change to an ideal gas?

Answer 19

Increasing pressure causes a gas to be less ideal It causes more interactions

Question 20

Temperature changes cause deviations in ideal gases by how?

Answer 20

Lowering the temperature causes a gas to be less ideal It does this by the lower temperature allowing more intermolecular attractions to occur

Question 21

1 moles of gas at STP = ?

Answer 21

22.4 L

Question 22

What equation accounts for deviations from gas ideality?

Answer 22

Van der waals (P + [n²a/V²]) (V-nb) = nRT a = attractive forces b = big particles This is just like the PV = nRT

Question 23

What is diffusion?

Answer 23

gas molecules distribute through volume by random motion

Question 24

Effusion is what?

Answer 24

flow of gas under pressure through a small opening

Question 25

All salts containing (group I) alakali metals or NH4+ are what?

Answer 25

soluble in water

Question 26

All salts containing nitrate (NO3-) or acetate (CH3COO-) are what?

Answer 26

water soluble.

Question 27

Arrhenius acid Bronsted Acid Lewis Acid

Answer 27

H+ donator Proton donator electron acceptor

Question 28

Kw = ?

Answer 28

[H+][OH-] = 10^-14

Question 29

Titration determines what?

Answer 29

molarity

Question 30

Titration determines molarity by reacting what?

Answer 30

known volume of unknown concentration with known volume of known concentration

Question 31

What is the half equivalence point of a titration?

Answer 31

the pH = pKa

Question 32

What is avogadro’s number ?

Answer 32

6.022 E 23 particles / mole