CHEM 280 MIDTERM EXAM WITH
OBJECTIVELY CORRECT
QUESTIONS AND ANSWERS
How many moles of lithium nitrate are theoretically produced if we
start with 3.4 moles of Ca(NO3)2 and 2.4 moles of Li3PO4?Reaction:
3Ca(NO3)2 + 2Li3PO4 → 6LiNO3 + Ca3(PO4)2
a. 7.2
b. 1.1
c. 1.2
d. 6.8
e. not enough information - ANSWERS-d. 6.8
How many moles of calcium chloride are theoretically produced for
the following reaction given we have 2.6 moles of HCl and 1.4 moles
of Ca(OH)2?
Reaction: 2HCl + Ca(OH)2 → 2H2O + CaCl2
a. 1.0
b. 1.3
c. 0.7
d. 1.4
e. not enough information - ANSWERS-b. 1.3
,The distance between adjacent wave crests is called:
a. nu.
b. trough.
c. wavelength.
d. frequency.
e. none of the above - ANSWERS-c. wavelength.
Which form of electromagnetic radiation has the longest wavelength?
a. Radio Waves
b. Microwaves
c. X-rays
d. Gamma Rays
e. Infrared Radiation - ANSWERS-a. Radio Waves
When sunlight is passed through a prism, what is observed?
a. white light
b. bright spots and lines
c. nothing
d. continuous spectrum
e. none of the above - ANSWERS-d. continuous spectrum
,Which subshell letter corresponds to a 4-leaf clover orbital pattern?
a. p
b. s
c. d
e. f
f. not enough information - ANSWERS-c. d
Which of the following elements has the electron configuration of
3s23p4 in its outermost shell?
a. Al
b. Si
c. Cl
d. S
e. none of the above - ANSWERS-d. S
How many electrons are unpaired in the orbitals of carbon?
a. 2
b. 4
c. 6
d. 12
, e. none of the above - ANSWERS-a. 2
What is the unit name and symbol for length? - ANSWERS-meter (m)
What is the unit name and symbol for mass? - ANSWERS-kilogram
(kg)
What is the unit name and symbol for temperature? - ANSWERS-
Kelvin (K)
What is the unit name and symbol for the amount of substance? -
ANSWERS-mole (mol)
What is the unit name and symbol for time? - ANSWERS-second (s)
Which state of matter has indefinite shape and is compressible?
a. liquid
b. solid
c. gas
d. plasma
e. none of the above - ANSWERS-c. gas
Which type of energy is associated with motion?
OBJECTIVELY CORRECT
QUESTIONS AND ANSWERS
How many moles of lithium nitrate are theoretically produced if we
start with 3.4 moles of Ca(NO3)2 and 2.4 moles of Li3PO4?Reaction:
3Ca(NO3)2 + 2Li3PO4 → 6LiNO3 + Ca3(PO4)2
a. 7.2
b. 1.1
c. 1.2
d. 6.8
e. not enough information - ANSWERS-d. 6.8
How many moles of calcium chloride are theoretically produced for
the following reaction given we have 2.6 moles of HCl and 1.4 moles
of Ca(OH)2?
Reaction: 2HCl + Ca(OH)2 → 2H2O + CaCl2
a. 1.0
b. 1.3
c. 0.7
d. 1.4
e. not enough information - ANSWERS-b. 1.3
,The distance between adjacent wave crests is called:
a. nu.
b. trough.
c. wavelength.
d. frequency.
e. none of the above - ANSWERS-c. wavelength.
Which form of electromagnetic radiation has the longest wavelength?
a. Radio Waves
b. Microwaves
c. X-rays
d. Gamma Rays
e. Infrared Radiation - ANSWERS-a. Radio Waves
When sunlight is passed through a prism, what is observed?
a. white light
b. bright spots and lines
c. nothing
d. continuous spectrum
e. none of the above - ANSWERS-d. continuous spectrum
,Which subshell letter corresponds to a 4-leaf clover orbital pattern?
a. p
b. s
c. d
e. f
f. not enough information - ANSWERS-c. d
Which of the following elements has the electron configuration of
3s23p4 in its outermost shell?
a. Al
b. Si
c. Cl
d. S
e. none of the above - ANSWERS-d. S
How many electrons are unpaired in the orbitals of carbon?
a. 2
b. 4
c. 6
d. 12
, e. none of the above - ANSWERS-a. 2
What is the unit name and symbol for length? - ANSWERS-meter (m)
What is the unit name and symbol for mass? - ANSWERS-kilogram
(kg)
What is the unit name and symbol for temperature? - ANSWERS-
Kelvin (K)
What is the unit name and symbol for the amount of substance? -
ANSWERS-mole (mol)
What is the unit name and symbol for time? - ANSWERS-second (s)
Which state of matter has indefinite shape and is compressible?
a. liquid
b. solid
c. gas
d. plasma
e. none of the above - ANSWERS-c. gas
Which type of energy is associated with motion?
