Unit 5: Gases
Unit 6: Thermochemistry
Unit 7: Electromagnetic Radiation
Unit 8: Trends & Molecular Geometry
Unit 9: Acids & Bases
100
Convert 456 kPa to Torr
3,420.28 Torr
100
Which of the following processes are exothermic? Select all that apply.
condensation
melting
boiling
deposition
sublimation
condensation
deposition
100
Which of the following regions of the electromagnetic spectrum has the longest wavelength?
blue light
x rays
infrared
microwaves
orange light
microwaves
100
How many valence electrons does nitrogen have?
5
100
Identify the conjugate acid-base pairs in the following equation:
200
How many grams of oxygen gas are contained in 300 mL at STP?
0.428 g O2
200
How much heat is released when 100 g of CuBr is reacted with Ni?
68.77 kJ
200
A laser emits light at 600 nm. What is the frequency of this radiation?
f = c/
f = 3.0x108 / 6.0 x 10-7
f = 5.0 x 1014 Hz
200
What are the formal charges on each element?
O = +1
C = 0
N = -2
200
What is the [OH-] in a solution with a pH of 3.5?
3.16 x 10-11 M
300
At constant temperature, 10 L of CO2 at 0.65 atm is compressed to 4.3 L. What is the final pressure?
1.51 atm
300
356 Joules of heat is required to change the temperature of 10 grams of a substance from 25 0C to 40 0C. What is the specific heat of the substance?
2.37 J/g0C
300
What are the noble gas electron configuration for:
a.) aluminum ion
b.)sulfide ion
c.) iron +3 ion
a.) [Ne]
b.) [Ar]
c.) [Ar] 3d5
300
What is the molecular geometry of NO3-1?
trigonal planar
300
What is the pH of a 25 mL of a 0.15 M solution of HCl?
0.824
400
A mixture of gases has a total pressure of 2.45 atm. The mixture contains 10 g of oxygen, 10 g of hydrogen, and 10 grams of carbon dioxide. What is the partial pressure of hydrogen?
2.21 atm
400
Determine the ∆H of the reaction using the given information.
235.1 kJ
400
Answer the following questions:
a.) What energy level contains 9 orbitals?
b.) Which of the following atoms is diamagnetic?
Na - Ni - Cl - No - N
c.) What element has the ground state electron configuration of 1s22s22p63s23p64s13d10
a.) 3rd energy level
b.) No
c.) Cu
400
D.
400
Which of the following statements is/are true for a 0.10 M solution of a strong acid? Select all that apply.
a.) pH = 1
b.) [H+] > [A-]
c.) [H+] = [A-]
d.) [H+] < [A-]
e.) pH < 1.0
f.) pH > 1.0
a.) pH = 1
c.) [H+] = [A-]
500
1.26 L
500
75 mL of water at 20 0C is combined with 189 mL of water at 67 0C. What is the final temperature of the water?
53.65 0C
500
A laser operates at 5.0 x 103 nm. What is the energy of 1 mole of photons with this wavelength?
23, 933.11 J
500
Which of the following molecules are polar? Select all that apply.
CO2 - CH4 - H2O - NH3 - SF6
NH3 and H2O
500
Calculate the amount of heat required to change 10 g of ice at -5 0C to water at 10 0C.
q = (10)(2.09) (5) = 104.5 J
q = (10)(333) = 3,330 J
q = (10)(4.184)(10) = 418.4 J
qtotal = 3852.9 J