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STRAIGHTERLINE CHEMISTRY FINAL EXAM TEST WITH COMPLETE SOLUTIONS
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STRAIGHTERLINE CHEMISTRY FINAL EXAM TEST WITH COMPLETE SOLUTIONS
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STRAIGHTERLINE CHEMISTRY FINALEXAM
1. Which of the following is an example of a covalent compound?
a) Sodium chloride (NaCl)
b) Magnesium oxide (MgO)
c) Carbon dioxide (CO₂)
d) Calcium sulfate (CaSO₄)
Answer: c) Carbon dioxide (CO₂)
2. What is the molarity of a solution prepared by dissolving 5.00 moles of sodium
chloride in 2.00 liters of solution?
a) 2.50 M
b) 10.0 M
c) 0.500 M
d) 2.00 M
Answer: a) 2.50 M
3. What is the empirical formula of a compound that is 40% carbon, 6.67% hydrogen,
and 53.33% oxygen by mass?
a) CH₃O
b) CHO
c) C₂H₅O
d) C₃H₆O₃
Answer: d) C₃H₆O₃
4. Which of the following elements has the highest ionization energy?
a) Sodium (Na)
,b) Magnesium (Mg)
c) Aluminum (Al)
d) Neon (Ne)
Answer: d) Neon (Ne)
5. In the reaction
2
𝐻
2
+
𝑂
2
→
2
𝐻
2
𝑂
2H
2
+O
2
→2H
2
O, what is the limiting reactant if 4 moles of
𝐻
2
H
2
react with 2 moles of
𝑂
2
O
2
?
a)
𝐻
2
H
,2
b)
𝑂
2
O
2
c)
𝐻
2
𝑂
H
2
O
d) There is no limiting reactant.
Answer: b)
𝑂
2
O
2
6. What is the pH of a solution with a hydrogen ion concentration of
1
×
1
0
−
4
1×10
−4
M?
a) 4
b) 10
c) 7
, d) 1
Answer: a) 4
7. Which of the following substances is a strong acid?
a) Acetic acid (CH₃COOH)
b) Sulfuric acid (H₂SO₄)
c) Carbonic acid (H₂CO₃)
d) Hydrofluoric acid (HF)
Answer: b) Sulfuric acid (H₂SO₄)
8. How many moles of potassium chloride (KCl) are in 250 grams of KCl? (Molar mass
of KCl = 74.55 g/mol)
a) 3.35 moles
b) 2.77 moles
c) 1.00 mole
d) 6.70 moles
Answer: b) 3.35 moles
9. What is the heat capacity of a substance if it absorbs 1500 J of heat and its
temperature increases by 15°C?
a) 100 J/°C
b) 75 J/°C
c) 90 J/°C
d) 150 J/°C
Answer: b) 100 J/°C
10. What type of reaction is represented by the following equation:
2
𝑁
𝑎
𝐶
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