Final

Question 1

The distance between adjacent crests is called

a. wavelength
b. amplitude
c. frequency
d. area
e. median

Answer 1

wavelength

Question 2

Which of the following visible colors of light has the highest frequency?

a. green
b. red
c. blue
d. yellow
e. orange

Answer 2

red

Question 3

Calc the frequency of the green light emitted by a hydrogen atom with a wavelength of 486.1 nm

a. 1.46 times 10 to the 14 s-1
b. 6.86 times 10 to the 14 s-1
c. 4.33 times 10 to the 14 s-1
d. 6.17 times 10 to the 14 s-1
e. 1.62 times 10 to the 14 s-1

Answer 3

D

Question 4

Calc the energy of the red light emitted by a neon atom with a wavelength of 703.2 nm.

a. 3.54 times 10 to the -19 J
b. 4.27 times 10 to the -19 J
c. 2.34 “
d. 6.54 “
3. 2.83 “

Answer 4

B

Question 5

Calc the wavelength of an electron (m=9.11 times 10 to the -28 g) moving at 3.66 times 10 to the 6 m/s

a. 1.99 * 10 ^-10 m
b. 5.03 * 10^-10 m
c. 1.81 * 10 ^-10 m
d. 5.52* 10^-9 m
e. 2.76*10^-9 m

Answer 5

A

Question 6

What are the possible orbitals for n=3

a. s, p, d
b. s, p,d ,f
c. s
d. s, p

Answer 6

A

Question 7

How many orbitals are contained in the third principal level (n=3) of a given atom?

a. 9
b. 3
c. 18
d. 7
e. 5

Answer 7

C

Question 8

Determine the energy change associated with the transition from n=2 to n=5 in the hydrogen atom

a. -2.18 * 10^-19 J
b. 6.54 “
c. 4.58”
d. -1.53 “
e. 3.76 “

Answer 8

C

Question 9

Predict the charge that an ion formed from sulfur would have

a. 1-
b. 6+
c. 3-
d. 4+
e. 2-

Answer 9

E

Question 10

Which of the following statements is false

a. an anion is usually larger than its corresponding atom
b. metals tend to form cations
c. an atoms is usually larger than its corresponding cation
d. the halogens tend to form 1+ ions
e. nonmetals tend to gain electrons

Answer 10

D

Question 11

How many valence electrons do the halogens possess

a. 5
b. 6
c. 2
d. 1
e. 7

Answer 11

E

Question 12

Choose the orbital diagram that represents the ground state of N
Look at number 12

Answer 12

A

Question 13

Place the following elements in order of increasing atomic radius
P, Ba, Cl
a. Ba<p></p>

Answer 13

C

Question 14

For a given atom, identify the species that has the smallest radius

a. cation
b. anion
c. neutral
d. they are all the same size

Answer 14

B

Question 15

Choose the valence orbital diagram that represents the ground state of Zn

Look at number 15

Answer 15

A

Question 16

How many moles of N2O4 are in 76.3 g N2O4? The molar mass of N2O4 is 92.02 g/mol.

a. 7.0210^3 moles
b. 1.4210^-4 moles
c. 1.00 moles
d. 1.21 moles
e. 0.829 moles

Answer 16

E

Question 17

What is the mass (in kg) of 6.89*10^25 molecules of CO2? The molar mass of CO2 is 44.01 g/mol

a. 3.85 kg
b. 5.04 kg
c. 2.60 kg
d. 3.03 kg
e. 6.39 kg

Answer 17

B

Question 18

How many atoms of carbon are contained in 47.6g of Al2(CO3)3? The molar mass of Al2(CO3)3 is 233.99 g/mol

a. 1.23 * 10^23 C atoms
b. 2.96 * 10 ^24 C atoms
c. 2.8710^25 C atoms
d. 1.1010^24 C atoms
e. 3.68 * 10^23 C atoms

Answer 18

A

Question 19

Determine the molecular formula of a compound that has a molar mass of 183.2 g/mol and an empirical formula of C2H5O2

a. C2H5O2
b. C6H15O6
c. C3H7O3
d. C4H10O4
e. C8H20O8

Answer 19

B

Question 20

Which of the following represents the lewis structure for Ca2+

Look at number 20

Answer 20

E

Question 21

A single covalent bond contains _______ of electrons

a. 0 pairs
b. 1 pair
c. 2 pairs
d. 3 pairs
e. 4 pairs

Answer 21

1 pair??

Question 22

Choose the bond below that is most polar.

a. H-I
b. H-Br
c. H-F
d. H-Cl
e. C-H

Answer 22

E

Question 23

Choose the best lewis structure for OCl2

look at number 23

Answer 23

E

Question 24

Choose the best lewis structure for CH2Cl2

look at number 24

Answer 24

B

Question 25

The distance between adjacent crests is called

frequency 
median 
wavelength 
amplitude 
area

Answer 25

Wavelength

Question 26

A sunburn is caused by overexposure to ________ radiation.

microwave 
ultraviolet 
x-ray 
gamma 
radio

Answer 26

ultraviolet

Question 27

How many photons are contained in a flash of green light (525 nm) that contains 189 kJ of energy?

A. 7.99 × 10^30 photons 
B. 4.99 × 10^23 photons 
C. 5.67 × 10^23 photons 
D. 1.25 × 10^31 photons 
E. 2.01 × 10^24 photons

Answer 27

B