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HESI CHEMISTRY V1/V2

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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?

0 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?

 0

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?

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 H2SO4?

6 (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?

8 ( 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?

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

29.          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?

............CONTINUED

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