Chemistry Practice Midterm Part 2
This quiz is to help prepare first year chemistry students for their first semester exam.
- 1.What is the difference between an element and a compound?
- A.
An element is a homogeneous mixture and a compound is a heterogeneous mixture.
- B.
An element is a pure substance and a compound is a physical mixture of elements.
- C.
An element is a pure substance and a compound is a chemical combination of elements.
- D.
None of these are correct.
- 2.You have 5.5 grams of Hydrogen in 50. grams of water. What is the percent of oxygen by mass?
- A.
11%
- B.
9.0%
- C.
.89 %
- D.
89 %
- 3.Which Law best describes this statement:"Mass is not created or destroyed, only rearranged."
- A.
Law of Conservation of Mass
- B.
Law of Definite Proportions
- C.
Law of Multiple Proportions
- D.
Law of Octaves
- 4.If I mix 8.8 grams of hydrogen with oxygen and get 80. grams of water, how many grams of oxygen did I use?
- A.
9. g
- B.
80. g
- C.
71. g
- D.
You need more information to answer this question.
- 5.
![What does the 6 in the above symbol represent? - ProProfs]( "What does the 6 in the above symbol represent?")
What does the 6 in the above symbol represent?- A.
Mass number
- B.
Atomic number
- C.
Atomic mass
- D.
None of these
- 6.
![What does 12.011 in the above symbol represent? - ProProfs]( "What does 12.011 in the above symbol represent?")
What does 12.011 in the above symbol represent?- A.
Mass number
- B.
Atomic number
- C.
Atomic mass
- D.
None of these.
- 7.Which of the following are true about isotopes?
- A.
The number of protons are the same, but the number of neutrons are different.
- B.
The number of protons are the same, but the number of electrons are different.
- C.
The number of neutrons are the same, but the number of electrons are different.
- D.
Two of these are correct.
- 8.What is the definition of frequency?
- A.
The energy of a wave.
- B.
How fast the wave is going.
- C.
One full cycle of a wave pattern.
- D.
The number of waves that pass a particular point in a second.
- 9.How many valence electrons does Sulfur have?
- A.
2
- B.
4
- C.
6
- D.
8
- 10.Use the following equations and Plank's constant (6.626 x 10-34 Js) to find the amount of energy carried by a photon that has a frequency of 5.00 x 1014 Hz.c= (wavelength) vE = hv
- A.
7.55 x 10^-21 J
- B.
9.06 x 10^26 J
- C.
3.31 x 10^-19 J
- D.
6.00 x 10^-7 J
- 11.Use the following equations and Plank's constant (6.626 x 10-34 Js) to find the frequency of light that has a wavelength of 440. nmc= (wavelength) vE = hv
- A.
6.82 x 10^14 Hz
- B.
6.82 x 10^16 Hz
- C.
4.52 x 10^-19 Hz
- D.
2.92 x 10^42 Hz
- 12.Use the following equations and Plank's constant (6.626 x 10-34 Js) to find the wavelength of a photon that has the energy of 5.00 x 10-19 J?c= (wavelength) vE = hv
- A.
7.55 x 10^14 nm
- B.
3.98 x 10^-7 nm
- C.
398 nm
- D.
600. nm
- 13.What type of elements are brittle solids?
- A.
Metals
- B.
Nonmetals
- C.
Metalloids
- D.
Transition metals
- 14.Where is the f block located on the periodic table.
- A.
The block to the far left.
- B.
The block in the middle.
- C.
The block to the far right.
- D.
The block below the main table.
- 15.What is the name of group 2?
- A.
Alkali metals
- B.
Alkaline earth metals
- C.
Halogens
- D.
Noble gases.
- 16.What is the periodic trend for electronegativity?
- A.
Increases going left to right and increases going down.
- B.
Increases going left to right and decreases going down.
- C.
Decreases going left to right and increases going down.
- D.
Decreases going left to right and decreases going down.
- 17.What is the periodic trend for ionization energy?
- A.
Increases going left to right and increases going down.
- B.
Increases going left to right and decreases going down.
- C.
Decreases going left to right and increases going down.
- D.
Decreases going left to right and decreases going down.
- 18.What is ionization energy?
- A.
Electron love.
- B.
The energy that it takes to gain an electron.
- C.
The energy that it takes to remove an electron.
- D.
Energy associated with losing 3 valence electrons
- 19.Which of the following is the largest in terms of radius?
- A.
Br-
- B.
Br
- C.
Cl
- D.
F
- 20.What element has the electron configuration of:[Ar] 4s2 3d5
- A.
Mn
- B.
Tc
- C.
Br
- D.
Cl
- 21.Which block on the period table has can hold 14 electrons
- A.
S
- B.
P
- C.
D
- D.
F
- 22.Where are the metals located on the periodic table.
- A.
S block
- B.
D and f block
- C.
Left of the 'staircase'
- D.
More than one of these is correct.
- 23.Which of the following are not one of the main parts of the scientific method?
- A.
Hypothesis
- B.
Observation
- C.
Experiment
- D.
All these are correct.
- 24.If I have a 1.0 liter jar in which I keep my lost marbles. What would be the mass of the marbles in the jar if each marble takes up approximately 1.3 ml of space and has a mass of 3.5 g. Assume that the marbles use the space efficiently.
- A.
27 kg
- B.
0.27 kg
- C.
2.7 kg
- D.
It is impossible to figure out since the jar is 3 dimensional.
- 25.Convert 820 nm to meters.
- A.
8.2 x 10^-9 m
- B.
8.2 x 10^7 m
- C.
8.2 x 10^9 m
- D.
8.2 x 10^-7 m
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