2022 HESI Chemistry A2 Exam With Answers (25 Solved Questions)
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CHEMISTRY
1. If Oxygen is in a compound, what would its oxidation number be?
-2
2. Which of the following pH values would lemon juice likely have?
2 because the lower the pH value, the more acidic
3. What is a pentose?
A 5 carbon sugar (Pent = 5) (dose = sugar)
4. 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)
5. How many neutrons does carbon 14 have?
8 (mass# - atomics # = neutrons) 14 - 6 = 8
6. How many protons does Potassium have?
19 (same as the atomic number)
1. If Oxygen is in a compound, what would its oxidation number be?
-2
2. Which of the following pH values would lemon juice likely have?
2 because the lower the pH value, the more acidic
3. What is a pentose?
A 5 carbon sugar (Pent = 5) (dose = sugar)
4. 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)
5. How many neutrons does carbon 14 have?
8 (mass# - atomics # = neutrons) 14 - 6 = 8
6. How many protons does Potassium have?
19 (same as the atomic number)
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