HESI A2 CHEMISTRY -with 100% verified
solutions-2023-2024
1. If a Hydrogen is in a compound, what would its oxidation number be?
+1
2. What is the oxidation number of any simple ion?
+1 or -1 depending on the charge of the ion
3. How many kilograms are in a pound?
0.453592 kg
4. What is the temperature for freezing point of water in Celsius?
0 degrees Celsius (32°F for Fahrenheit)
5. What is the conversion of Celsius to Fahrenheit?
0°C = 32°F
6. What is the oxidation number of an element atom?
0
7. What is the freezing point of sea water in Fahrenheit?
0°F
8. How many amino acids are in a dipeptide?
2
9. If Oxygen is in a compound, what would its oxidation number be?
-2
10. Which of the following pH values would lemon juice likely have?
2 because the lower the pH value, the more acidic
11. What is a pentose?
A 5 carbon sugar (Pent = 5) (ose = sugar)
12. What is the oxidation state of the Sulfur atom in Sulfuric Acid H SO ?
2 4
6
13. How many neutrons does carbon 14 have?
8 ( mass# - atomics # = neutrons) 14 - 6 = 8
14. How many protons does Potassium have?
19
15. How many amino acids are essential for human life?
20 amino acids
16. Normal body temperature in °C?
37°C
17. Normal body temperature in °F?
98.6°F
18. Boiling point of water in °C?
100°C
19. Boiling point of water in °F?
212°F
20. 0°K is equal to °C? -273°C
21. The term Amphoteric means?
, A substance that can act as both a base & acid
22. What is Kelvin based around?
, Stuvia.com - The Marketplace to Buy and Sell
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Study Material
Material
Absolute zero
23. A compound that is a Hydrogen or proton donor, corrosive to metals, causes blue litmus
paper to become red and becomes less acidic when mixed with a base is?
Acid
24. Mixture of 2 or more metals are?
Alloys
25. Acids:
33. Atomic #:
# of protons in nucleus of an atom
34. Base?
• A Hydrogen or proton ACCEPTOR & has hydroxide group in the makeup of the
molecule
, • Produce -OH
• Bitter, slippery, conduct electricity, formulas contain -OH
• pH value greater than 7.0
• Proton acceptor
35. Key note:
Acids are Proton donors as Bases are proton acceptors
36. Beta radiation:
• Decomposition product of a proton or neutron
• High speed/energy Electrons
• EITHER - charged electrons or + charged positrons
• Can be stopped by aluminum foil
37. What is Biochemistry?
Study of substances & processes occurring in living things
38. Fahrenheit is based off of?
Body temperature
39. How does ↑ Surface area speed up chemical reactions?
By ↑ areas of contact where chemical reactions can occur
40. How do catalyst accelerate a chemical reaction?
By reducing the amount of energy needed for a reaction to occur
41. What does COOH symbolize?
A Carboxyl group
42. Which of the following is not a solution type?
Catalyst
43. Define Catalyst.
Substance that speeds up a chemical reaction.
44. What is an atom called when it LOSES 1 or more electrons?
Cations
45. What is chemical bonding?
The joining of atoms to form new substances. 2 types: ionic & covalent bonding
46. What is a Ionic bond?
• Electrical attraction between 2 oppositely charged atoms groups of atoms called
ions
• (between metals & nonmetals)
47. Ionic bonding?
Chemical bond that’s formed when an atom transfers a electron to another atom.
(steals)
48. Single Covalent bond?
• Chemical bond that shares 1 electron pair
• Formed by non-metals
49. What are chemical reactions?
Making & breaking of chemical bonds, leading to changes in composition of matter
50. Double Covalent bond?
solutions-2023-2024
1. If a Hydrogen is in a compound, what would its oxidation number be?
+1
2. What is the oxidation number of any simple ion?
+1 or -1 depending on the charge of the ion
3. How many kilograms are in a pound?
0.453592 kg
4. What is the temperature for freezing point of water in Celsius?
0 degrees Celsius (32°F for Fahrenheit)
5. What is the conversion of Celsius to Fahrenheit?
0°C = 32°F
6. What is the oxidation number of an element atom?
0
7. What is the freezing point of sea water in Fahrenheit?
0°F
8. How many amino acids are in a dipeptide?
2
9. If Oxygen is in a compound, what would its oxidation number be?
-2
10. Which of the following pH values would lemon juice likely have?
2 because the lower the pH value, the more acidic
11. What is a pentose?
A 5 carbon sugar (Pent = 5) (ose = sugar)
12. What is the oxidation state of the Sulfur atom in Sulfuric Acid H SO ?
2 4
6
13. How many neutrons does carbon 14 have?
8 ( mass# - atomics # = neutrons) 14 - 6 = 8
14. How many protons does Potassium have?
19
15. How many amino acids are essential for human life?
20 amino acids
16. Normal body temperature in °C?
37°C
17. Normal body temperature in °F?
98.6°F
18. Boiling point of water in °C?
100°C
19. Boiling point of water in °F?
212°F
20. 0°K is equal to °C? -273°C
21. The term Amphoteric means?
, A substance that can act as both a base & acid
22. What is Kelvin based around?
, Stuvia.com - The Marketplace to Buy and Sell
Sell your
your Study
Study Material
Material
Absolute zero
23. A compound that is a Hydrogen or proton donor, corrosive to metals, causes blue litmus
paper to become red and becomes less acidic when mixed with a base is?
Acid
24. Mixture of 2 or more metals are?
Alloys
25. Acids:
33. Atomic #:
# of protons in nucleus of an atom
34. Base?
• A Hydrogen or proton ACCEPTOR & has hydroxide group in the makeup of the
molecule
, • Produce -OH
• Bitter, slippery, conduct electricity, formulas contain -OH
• pH value greater than 7.0
• Proton acceptor
35. Key note:
Acids are Proton donors as Bases are proton acceptors
36. Beta radiation:
• Decomposition product of a proton or neutron
• High speed/energy Electrons
• EITHER - charged electrons or + charged positrons
• Can be stopped by aluminum foil
37. What is Biochemistry?
Study of substances & processes occurring in living things
38. Fahrenheit is based off of?
Body temperature
39. How does ↑ Surface area speed up chemical reactions?
By ↑ areas of contact where chemical reactions can occur
40. How do catalyst accelerate a chemical reaction?
By reducing the amount of energy needed for a reaction to occur
41. What does COOH symbolize?
A Carboxyl group
42. Which of the following is not a solution type?
Catalyst
43. Define Catalyst.
Substance that speeds up a chemical reaction.
44. What is an atom called when it LOSES 1 or more electrons?
Cations
45. What is chemical bonding?
The joining of atoms to form new substances. 2 types: ionic & covalent bonding
46. What is a Ionic bond?
• Electrical attraction between 2 oppositely charged atoms groups of atoms called
ions
• (between metals & nonmetals)
47. Ionic bonding?
Chemical bond that’s formed when an atom transfers a electron to another atom.
(steals)
48. Single Covalent bond?
• Chemical bond that shares 1 electron pair
• Formed by non-metals
49. What are chemical reactions?
Making & breaking of chemical bonds, leading to changes in composition of matter
50. Double Covalent bond?
