1.
Chemistry,HESI A2
Which of the following is the SI unit of length?
1 out of 100
2.
Chemistry,HESI A2
Which species is the oxidizing agent in the following reaction? Mg + 2 HCl → MgCl2 + H2
2 out of 100
3.
Chemistry,HESI A2
Elements in the modern periodic table are arranged by increasing what?
3 out of 100
4.
Chemistry,HESI A2
In a chemical equation, what do (aq), (l), (g), and (s) represent?
4 out of 100
5.
Chemistry,HESI A2
If a temperature were to decrease by 100 Kelvins, how much would this temperature decrease on the Celsius scale?
5 out of 100
6.
Chemistry,HESI A2
Which of the following correctly states Le Chatlier’s principle?
6 out of 100
7.
Chemistry,HESI A2
If a certain reversible reaction was at equilibrium, what would happen to this equilibrium if more reactants were added?
7 out of 100
8.
Chemistry,HESI A2
Calculate the molarity of a solution that contains 2.5 moles in 195 liters
8 out of 100
9.
Chemistry,HESI A2
A chemist wants to make 5 L of a solution of NaCl that has a molarity of 0.5. How many moles of NaCl do they need?
9 out of 100
10.
Chemistry,HESI A2
How many neutrons are in germanium-62?
10 out of 100
11.
Chemistry,HESI A2
Normal body temperature is considered to be 98.6oF. What is the normal body temperature in degrees Celsius?
11 out of 100
12.
Chemistry,HESI A2
Which of the options correctly shows the reduction that occurs in the following reaction? Fe + 3O2 → 2Fe2O3
12 out of 100
13.
Chemistry,HESI A2
Which of the following options correctly shows the products between the acid-base reaction between NaOH and HCl?
13 out of 100
14.
Chemistry,HESI A2
Which of the following is not a property of an acid?
14 out of 100
15.
Chemistry,HESI A2
F-21 has a half-life of 5 seconds. How long will it take a 50 g sample of F-21 to decay to a mass of 12.5 g?
15 out of 100
16.
Chemistry,HESI A2
Which of the following shows a synthesis reaction?
16 out of 100
17.
Chemistry,HESI A2
What percentage of an original sample of iodine-131 will remain after 64 days if iodine-131 has a half-life of 8 days?
17 out of 100
18.
Chemistry,HESI A2
Which of the following represents the general form of a decomposition reaction?
18 out of 100
19.
Chemistry,HESI A2
Glycosidic bonds are found in what type of molecules?
19 out of 100
20.
Chemistry,HESI A2
Which of the following types of chemicals participates in a double replacement reaction?
20 out of 100
21.
Chemistry,HESI A2
What type of electrons participate in chemical bonds?
21 out of 100
22.
Chemistry,HESI A2
Glycogen is composed of which of the following sugars?
22 out of 100
23.
Chemistry,HESI A2
What generally happens to a reaction when the temperature increases?
23 out of 100
24.
Chemistry,HESI A2
Which of the following is not a polysaccharide?
24 out of 100
25.
Chemistry,HESI A2
A certain isotope of manganese has 25 protons, 17 neutrons, and 25 electrons. What is the correct name for this isotope?
25 out of 100
26.
Chemistry,HESI A2
What is meant by the phrase “the equilibrium lies far to the right”?
26 out of 100
27.
Chemistry,HESI A2
If necessary, use the periodic table to answer the following question. Click here to open the periodic table in a new tab. How many elements are in period 3 of the periodic table?
27 out of 100
28.
Chemistry,HESI A2
What are the units of molarity?
28 out of 100
29.
Chemistry,HESI A2
Which of the following is an intramolecular force?
29 out of 100
30.
Chemistry,HESI A2
What is the molarity of an aqueous solution with 0.40 moles of sugar dissolved in 5 liters of water?
30 out of 100
31.
Chemistry,HESI A2
Use the periodic table to answer the following question, if needed. What is the identity of an atom with 24 protons, 30 neutrons, and 24 electrons?
31 out of 100
32.
Chemistry,HESI A2
The mass of a grain of sand is 1.672 × 10^-4 kg. Express this number in standard notation.
32 out of 100
33.
Chemistry,HESI A2
When a chemist dips a piece of blue litmus paper into a solution, no color change is observed. Why?
33 out of 100
34.
Chemistry,HESI A2
On which of the following temperature scales can a negative number not exist?
34 out of 100
35.
Chemistry,HESI A2
If a solution is neutral, where would its pH lie?
35 out of 100
36.
Chemistry,HESI A2
Which is the reducing agent in the following reaction? HNO3 + HI→ NO + I2 + H2O
36 out of 100
37.
Chemistry,HESI A2
What does the mass number of an atom represent?
37 out of 100
38.
Chemistry,HESI A2
Which of the following is not likely to have a dipole?
38 out of 100
39.
Chemistry,HESI A2
Which of the following is located in Group 2 of the periodic table?
39 out of 100
40.
Chemistry,HESI A2
The half-life of As-81 is 33 seconds. If only 12.5 g of a 100.0 g sample of As-81 is left, how long did it take for the original sample to decay to its current mass?
40 out of 100
41.
Chemistry,HESI A2
Which of the following represents the correct electron configuration for sodium (Na)?
41 out of 100
42.
Chemistry,HESI A2
Cesium-137 has a half-life of 30 years. If a 2.0 g sample of cesium-137 decays over 120 years, how much would remain?
42 out of 100
43.
Chemistry,HESI A2
Answer: 0.08 M Molarity is defined as moles of solute divided by liters of solution and has units of mol/L. To get this answer, you just divide the number of moles by the volume in liters: 0.40 mol/5 L = 0.08 M
43 out of 100
44.
Chemistry,HESI A2
How many total amino acids are needed for the human body to produce all the proteins it needs?
44 out of 100
45.
Chemistry,HESI A2
How many neutrons does 58Cr have?
45 out of 100
46.
Chemistry,HESI A2
What is 6,987,000 in scientific notation?
46 out of 100
47.
Chemistry,HESI A2
Which element is located in both Group 2 and Period 4?
47 out of 100
48.
Chemistry,HESI A2
Which of the following elements is located in period 2 of the periodic table?
48 out of 100
49.
Chemistry,HESI A2
If a fat has more than one double bond, what is it called?
49 out of 100
50.
Chemistry,HESI A2
How many protons does the element xenon (Xe) have?
50 out of 100
51.
Chemistry,HESI A2
How many electrons does a neutral atom of nitrogen have?
51 out of 100
52.
Chemistry,HESI A2
Which of the following comprise an ionic compound?
52 out of 100
53.
Chemistry,HESI A2
What are the three main components of a number that is expressed in scientific notation?
53 out of 100
54.
Chemistry,HESI A2
Which of the following is a positively-charged atom?
54 out of 100
55.
Chemistry,HESI A2
What is the percent concentration of benzene in a solution containing 59 mL of benzene and 150 mL toluene?
55 out of 100
56.
Chemistry,HESI A2
What is the name given to a negatively-charged atom?
56 out of 100
57.
Chemistry,HESI A2
Which of the following best describes what occurs when an equilibrium is established in a reaction?’
57 out of 100
58.
Chemistry,HESI A2
Why does increasing the surface area of reactants or catalysts increase the rate of a reaction?
58 out of 100
59.
Chemistry,HESI A2
An oxidizing agent does which of the following?
59 out of 100
60.
Chemistry,HESI A2
How many moles of LiOH are in 500 mL of a 1.50 M LiOH solution?
60 out of 100
61.
Chemistry,HESI A2
Which type of reaction below represents an acid-base reaction?
61 out of 100
62.
Chemistry,HESI A2
Which of the following pairs would result in an acid-base neutralization reaction?
62 out of 100
63.
Chemistry,HESI A2
H2O is an example of which of the following:
63 out of 100
64.
Chemistry,HESI A2
Which of the options correctly shows the oxidation that occurs in the following reaction? 2Na + 2H2O → 2NaOH + H2
64 out of 100
65.
Chemistry,HESI A2
How many days will it take 128 kilograms of a radioactive substance to decay to 16 kilograms if it has a half-life of 32 days?
65 out of 100
66.
Chemistry,HESI A2
When ethylamine is added to water, it creates an alkaline solution. Which of option below would best represent the pH of this solution?
66 out of 100
67.
Chemistry,HESI A2
In a redox reaction, oxidation is the _______ of electrons and reduction is the _______ of electrons.
67 out of 100
68.
Chemistry,HESI A2
What functional group do fatty acids contain?
68 out of 100
69.
Chemistry,HESI A2
What does the atomic mass of an element represent?
69 out of 100
70.
Chemistry,HESI A2
Which of the following is the atomic number for the element francium?
70 out of 100
71.
Chemistry,HESI A2
Which of the following is not a subatomic particle?
71 out of 100
72.
Chemistry,HESI A2
An atom with 7 protons, 8 neutrons, and 10 electrons has which of the following charges?
72 out of 100
73.
Chemistry,HESI A2
Which of the following particles has a negative charge?
73 out of 100
74.
Chemistry,HESI A2
Which of the states of matter have a definite volume?
74 out of 100
75.
Chemistry,HESI A2
Sucrose is an example of what type of carbohydrate?
75 out of 100
76.
Chemistry,HESI A2
What are the two types of particles that can be emitted during beta decay?
76 out of 100
77.
Chemistry,HESI A2
Which of the following orbits the nucleus of an atom?
77 out of 100
78.
Chemistry,HESI A2
Which of the following phase transition describes the change from ice into steam?
78 out of 100
79.
Chemistry,HESI A2
Which of the following states of matter for a certain substance is generally the densest?
79 out of 100
80.
Chemistry,HESI A2
Which of the following states of matter take the shape of the container they are placed in?
80 out of 100
81.
Chemistry,HESI A2
What atom property determines if a bond is polar or non-polar?
81 out of 100
82.
Chemistry,HESI A2
What state of matter are unsaturated fats at room temperature?
82 out of 100
83.
Chemistry,HESI A2
Scientific notation is used by scientists to write very large and very small numbers. Which option correctly represents the scientific notation of 0.000001846?
83 out of 100
84.
Chemistry,HESI A2
Which element does the electron configuration 1s2 2s2 2p4 represent?
84 out of 100
85.
Chemistry,HESI A2
What is 540 Kelvin in degrees Celsius?
85 out of 100
86.
Chemistry,HESI A2
Which intermolecular force is the strongest?
86 out of 100
87.
Chemistry,HESI A2
Which of the following describes a decomposition reaction?
87 out of 100
88.
Chemistry,HESI A2
Which of the following subatomic particles are located in the nucleus?
88 out of 100
89.
Chemistry,HESI A2
Which of the following is correct?
89 out of 100
90.
Chemistry,HESI A2
Which element on the periodic table has 8 protons?
90 out of 100
91.
Chemistry,HESI A2
What is the other name for the metric system?
91 out of 100
92.
Chemistry,HESI A2
Which of the following best describes an ion?
92 out of 100
93.
Chemistry,HESI A2
Which of the following is the SI unit used to measure the amount of a substance?
93 out of 100
94.
Chemistry,HESI A2
Which of the following is the metric system’s basic measure of distance?
94 out of 100
95.
Chemistry,HESI A2
Which metric prefix is represented numerically by 10^-3?
95 out of 100
96.
Chemistry,HESI A2
What is 6.5 × 10^-5 equal to in standard form?
96 out of 100
97.
Chemistry,HESI A2
Which of the following best describes a cation?
97 out of 100
98.
Chemistry,HESI A2
What is 85oC in degrees Fahrenheit.
98 out of 100
99.
Chemistry,HESI A2
Which of the following correctly defines the term isotope?
99 out of 100
100.
Chemistry,HESI A2
Which of the following Kelvin temperatures represents the freezing point of water?
100 out of 100
