HESI CHEMISTRY V1/V2

HESI CHEMISTRY V1/V2

1.If Hydrogen is in a compound, what would its oxidation number be?+1 2.What is the oxidation number of any simple ion?The same as 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?

• degrees Celsius (32°F for Fahrenheit)

5.What is the conversion of Celsius to Fahrenheit?5F=9C+160 (remember 5F because you have 5 fingers on a hand & 9C because cats have 9 lives) 6.What is the oxidation number of an element atom?

7.What is the freezing point of sea water in Fahrenheit?Below 0C (pick and answer choice around -2C, actual temp depends on how much salt is in the water) 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?

• 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 H2SO4?

• (each H is +1, each O is -2. All charges have to add to 0. 2+S-8=0, so S=6)

13.How many neutrons does carbon 14 have?

• ( mass# - atomics # = neutrons) 14 - 6 = 8

14.How many protons does Potassium have?19 (same as the atomic number) 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? This study source was downloaded by 100000831988016 from CourseHero.com on 01-05-2022 04:39:38 GMT -06:00 https://www.coursehero.com/file/64230888/HESI-CHEMISTRY-V1V2-EDITED-2-29-2020-2docx/

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?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:

pH less than 7.0 sour/tart Formulas begin with H (Hydrogen) Proton Donor 26.3 types of radiation in nuclear chemistry?Alpha, Beta & Gamma

27.Alpha radiation:

* Emission of Helium (He) ions in the nuclei * Contains 2 protons & 2 neutrons.* +2 Charge * Largest radiation particle.* Can be stopped by piece of paper 28.Type of Alloy in which another metal is dissolved in Mercury (Hg)?Amalgam

• Proteins are made up of?

Amino Acids 30.Glycogen is what kind of starch?Animal Starch 31.When an atom GAINS ONE or more electrons?Anions (negative ion) 32.Basic building block of a molecule?Atom 33.Atomic mass? This study source was downloaded by 100000831988016 from CourseHero.com on 01-05-2022 04:39:38 GMT -06:00 https://www.coursehero.com/file/64230888/HESI-CHEMISTRY-V1V2-EDITED-2-29-2020-2docx/

Average mass of an elements isotope

34.Atomic #:

# of protons in nucleus of an atom 35.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

36.Key note:

Acids are Proton donors and Bases are proton acceptors

37.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 38.What is Biochemistry?Study of substances & processes occurring in living things 39.Fahrenheit is based off of?Body temperature 40.How does ↑ Surface area speed up chemical reactions?By ↑ areas of contact where chemical reactions can occur 41.How do catalyst accelerate a chemical reaction?By reducing the amount of energy needed for a reaction to occur A catalyst is a substance that accelerates a reaction by which of the following? -Finding an alternative pathway for a reaction that requires less energy.

42.What does COOH symbolize?A Carboxyl group 43.Which of the following is not a solution type?Catalyst 44.Define Catalyst.Substance that speeds up a chemical reaction.

45.What is an atom called when it LOSES 1 or more electrons? This study source was downloaded by 100000831988016 from CourseHero.com on 01-05-2022 04:39:38 GMT -06:00 https://www.coursehero.com/file/64230888/HESI-CHEMISTRY-V1V2-EDITED-2-29-2020-2docx/

Cations (positive ions) 46.What is chemical bonding?The joining of atoms to form new substances. 2 types: ionic & covalent bonding 47.What is an Ionic bond?Electrical attraction between 2 oppositely charged atoms called ions (between metals & nonmetals)

• Ionic bonding?

Chemical bond that’s formed when an atom transfers an electron to another atom.(steals) 49.Single Covalent bond?Chemical bond that shares 1 electron pair Formed by non-metals Sharing is caring! Caring is covalent!

50.What are chemical reactions?Making & breaking of chemical bonds, leading to changes in composition of matter 51.Double Covalent bond?When 2 electron pairs are shared 52.Triple Covalent bond?When 3 electron pairs are shared 53.The following is an example of?Combustion reaction (in combustion, O2 is always a reactant, CO2 and H2O are always products the second reactant is the compound being combusted) 2C2H6 (g) + 7O2 (g)  4CO2(g) + 6H2O 54.What is a combustion reaction?A chemical reaction that occurs when a substance reacts with Oxygen, releasing energy in the form of heat & light (also releases carbon dioxide & water) 55.What is a compound?Combination of 2 or more elements or atoms.Made up of atoms of 2 or more different elements joined by chemical bonds 56.Different types of solutions?Compounds, Alloys, Amalgams, Emulsions 57.Strongest type of chemical bond?Covalent 58.What is a decomposition reaction?A SINGLE compound breaks down to form 2 or more simpler substances 59.What is Deoxyribose?A sugar used in the formation of DNA 60.Attractions between opposite charges of polar moles?Dipole-dipole forces 61.What is a Disaccharide? This study source was downloaded by 100000831988016 from CourseHero.com on 01-05-2022 04:39:38 GMT -06:00 https://www.coursehero.com/file/64230888/HESI-CHEMISTRY-V1V2-EDITED-2-29-2020-2docx/