Overall Chem Final Knowledge :) (you got this!!!!)

Question 1

kilo is 10 to the ____

Answer 1

3

Question 2

deci is 10 to the ___

Answer 2

-1

Question 3

centi is 10 to the ___

Answer 3

-2

Question 4

milli is 10 to the ___

Answer 4

-3

Question 5

micro is 10 to the ___

Answer 5

-6

Question 6

nano is 10 to the ____

Answer 6

-9

Question 7

The charge of an atom is..

Answer 7

protons - charge

Question 8

What is a weak acid in water?

Answer 8

HF

Question 9

Which has more oxygen nitric acid or nitrous acid?

Answer 9

nitric acid (HNO3)

Question 10

What equation would you use to find the average mass of an element?

Answer 10

atomic mass= (fraction of 1st isotope x mass of isotope) + (fraction of 2nd isotope x mass of isotope)

Question 11

How do you find the empirical formula?

Answer 11

find the number of moles for every compound, divide the number of moles of each element by the smallest number of moles, use those numbers to find ratio

Question 12

How do you find the limiting reactant?

Answer 12

write balanced equation, find stoichiometric ratio of reactants (the moles), compare the stoichiometry to what you have

Question 13

How do you calculate percent yield?

Answer 13

experimental/theoretical x 100

Question 14

What is the dilution equation?

Answer 14

M1V1= M2V2
M= concentration
V= volume

Question 15

An acid ____ H+

Answer 15

gives

Question 16

A base ___ H+

Answer 16

takes (with OH-)

Question 17

One weak base to look out for…

Answer 17

NH3

Question 18

Oxidized ____ electrons; Reduced_____ electrons

Answer 18

loses, gains

Question 19

How do you balance oxygen in a redox reaction?

Answer 19

add H2O

Question 20

What does R equal in PV=nRT

Answer 20

0.0821 L atm/mol K

Question 21

What is STP?

Answer 21

1 atm; 273 K; 22.4 L

Question 22

For final and initial state problems, what equation do you use?

Answer 22

P1V1/nT1 = P2V2/nT2

Question 23

What equation would you use to solve for the density of a gas?

Answer 23

d= (P x MM) / (R x T)

Question 24

What is the equation when gas is collected over water?

Answer 24

Ptot = PH2O + Pgas

Question 25

Partial pressure and mole fraction equation

Answer 25

Pa/ Ptot = na/ ntot

Question 26

mole fraction equation

Answer 26

Xa = na/ntot (the # of moles A divide by the total # of moles of gas in mixture)

Question 27

Dalton's Law + Mole Fraction equation

Answer 27

Pa= Xa x Ptot (partial pressure of gas A= the mole fraction x total pressure)

Question 28

Effusion of gasses equation (Graham's law)

Answer 28

rate of effusion B/ rate of effusion A = (MMa/MMb)^1/2 (rate of effusion B divide by rate of effusion A equals the square of the MM of a divide by the MM of b)

Question 29

coffee-cup calorimetry equation

Answer 29

-qrxn= mH2O x 4.18 J/gC x ΔT

Question 30

equation to solve for heat

Answer 30

q= mcΔT

Question 31

Exothermic reaction

Answer 31

has negative q; heat flows FROM system INTO the surroundings (system is hot)

Question 32

Endothermic

Answer 32

has positive q; heat INTO the system FROM the surroundings (system is cold)

Question 33

If the problem says energy/heat evolved then ΔH is...

Answer 33

negative

Question 34

Enthalpy equation

Answer 34

ΔH= H Products - H Reactants

Question 35

Enthalpy of formation calculation

Answer 35

ΔH= sum of products - sum of reactants

Question 36

wavelength frequency equation

Answer 36

λv=c c=2.998 x 10^8 m/s

Question 37

the wavelength has to be in what units?

Answer 37

meters

Question 38

the frequency has to be in what units?

Answer 38

s^-1

Question 39

how to calculate the energy of a photon

Answer 39

E= hv = hc/λ h= 6.626 x 10^-34

Question 40

how do you calculate energy release?

Answer 40

ΔE= 2.18 x10^-18 (1/n^2 - 1/n^2) (the first n= lowest; second= highest)

Question 41

How do you find the wavelength using mass and velocity?

Answer 41

λ= h/ (mass) (velocity) h= 6.626 x 10^-34

Question 42

in reference to quantum numbers, n refers to

Answer 42

principal quantum number

Question 43

The quantum sublevel number, l, equals...

Answer 43

n-1

Question 44

formal charge equation

Answer 44

formal charge= VE - unshared electrons- 1/2 bonding

Question 45

paramagnetic

Answer 45

unpaired e-

Question 46

diamagnetic

Answer 46

paired e-

Question 47

bond enthalpy equation

Answer 47

ΔH= sum of bonds broken - sum of bonds formed

Question 48

What equation do you use to calculate the energy change of a system when given thermal energy and work done?

Answer 48

E= q + w q= thermal energy w= work

Question 49

How does MM affect speed of molecules?

Answer 49

Higher MM, Lower speed

Question 50

What is the relationship between frequency and energy?

Answer 50

Higher frequency, Higher energy

Question 51

Is energy difference higher or lower with lower n values?

Answer 51

higher

Question 52

Boiling point depends on...

Answer 52

intermolecular forces

Question 53

______ has the highest boiling point; ______ has the lowest

Answer 53

ionic, disperson (london)

Question 54

Hydrogen bonds happen on...

Answer 54

F,O,N

Question 55

Lattice energy

Answer 55

the amount of energy required to completely separate a mole of solid into its gaseous ions

Question 56

N likes to have how many bonds and lone pairs

Answer 56

3 bonds and 1 lone pair

Question 57

O likes to have how many bonds and lone pairs

Answer 57

2 bonds and 2 lone pairs