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HESI A2 CHEMISTRY 2021.
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Stuvia.com - The Marketplace to Buy and Sell your Study MaterialHESI A2
CHEMISTRY
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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?
m
0
er as
7. What is the freezing point of sea water in Fahrenheit?
co
eH w
Below 0C (pick and answer choice around -2C, actual temp depends on how much salt
is in the water)
o.
8.
rs e
How many amino acids are in a dipeptide?
ou urc
2
9. If Oxygen is in a compound, what would its oxidation number be?
-2
o
10. Which of the following pH values would lemon juice likely have?
aC s
2 because the lower the pH value, the more acidic
vi y re
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?
ed d
6 (each H is +1, each O is -2. All charges have to add to 0. 2+S-8=0, so S=6)
ar stu
13. How many neutrons does carbon 14 have?
8 ( mass# - atomics # = neutrons) 14 - 6 = 8
14. How many protons does Potassium have?
is
19 (same as the atomic number)
15. How many amino acids are essential for human life?
Th
20 amino acids
16. Normal body temperature in °C?
37°C
sh
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?
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