HESI A2 CHEMISTRY V1/V2 FILE
- If a Hydrogen is in a compound, what would its oxidation number be? +1
- What is the oxidation number of any simple ion?
+1 or -1 depending on the charge of the ion - How many kilograms are in a pound?
0.453592 kg - What is the temperature for freezing point of water in Celsius?
0 degrees Celsius (32°F for Fahrenheit) - What is the conversion of Celsius to Fahrenheit?
0°C = 32°F - What is the oxidation number of an element atom?
0 - What is the freezing point of sea water in Fahrenheit? 0°F
- How many amino acids are in a dipeptide?
2 - If Oxygen is in a compound, what would its oxidation number be?
-2 - Which of the following pH values would lemon juice likely have?
2 because the lower the pH value, the more acidic - What is a pentose?
A 5 carbon sugar (Pent = 5) (ose = sugar) - What is the oxidation state of the Sulfur atom in Sulfuric Acid H2SO4? 6
- How many neutrons does carbon 14 have?
8 ( mass# – atomics # = neutrons) 14 – 6 = 8 - How many protons does Potassium have?
19 - How many amino acids are essential for human life?
20 amino acids - Normal body temperature in °C? 37°C
- Normal body temperature in °F?
98.6°F - Boiling point of water in °C? 100°C
- Boiling point of water in °F?
212°F - 0°K is equal to °C? -273°C
- The term Amphoteric means?
A substance that can act as both a base & acid 22.
What is Kelvin based around?
2 / 4
Absolute zero - 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 - Mixture of 2 or more metals are?
Alloys
- 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
- Key note:
Acids are Proton donors as Bases are proton acceptors - 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
- What is Biochemistry?
Study of substances & processes occurring in living things - Fahrenheit is based off of? Body temperature
- How does ↑ Surface area speed up chemical reactions?
By ↑ areas of contact where chemical reactions can occur - How do catalyst accelerate a chemical reaction?
By reducing the amount of energy needed for a reaction to occur - What does COOH symbolize? A Carboxyl group
- Which of the following is not a solution type? Catalyst
- Define Catalyst.
Substance that speeds up a chemical reaction. - What is an atom called when it LOSES 1 or more electrons? Cations
- What is chemical bonding?
The joining of atoms to form new substances. 2 types: ionic & covalent bonding - What is a Ionic bond?
- Electrical attraction between 2 oppositely charged atoms groups of atoms called ions
- (between metals & nonmetals)
- Ionic bonding?
Chemical bond that’s formed when an atom transfers a electron to another atom. (steals) - Single Covalent bond?
- Chemical bond that shares 1 electron pair
- Formed by non-metals
- What are chemical reactions?
Making & breaking of chemical bonds, leading to changes in composition of matter - Double Covalent bond?
When 2 electron pairs are shared 51.
Triple Covalent bond?
When 3 electron pairs are shared - The following is an example of? Combustion reaction