Straighterline Chemistry Final Exam Questions and Answers | Latest Version | 2024/2025 | Already Passed
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Course
Straighterline Chemistry
Institution
Straighterline Chemistry
Straighterline Chemistry Final Exam
Questions and Answers | Latest Version
| 2024/2025 | Already Passed
What is the primary purpose of a catalyst in a chemical reaction?
To increase the equilibrium constant
To increase the rate of the reaction
To shift the position of equilibrium
To low...
Straighterline Chemistry Final Exam
Questions and Answers | Latest Version
| 2024/2025 | Already Passed
What is the primary purpose of a catalyst in a chemical reaction?
To increase the equilibrium constant
To increase the rate of the reaction
To shift the position of equilibrium
✔✔ To lower the activation energy required for the reaction
Which of the following represents the correct electron configuration for an oxygen atom?
1s² 2s² 2p²
1s² 2s² 2p⁴
1s² 2s² 2p³
✔✔ 1s² 2s² 2p⁴
In which type of bond do atoms share electrons equally?
Ionic bond
Polar covalent bond
1
,✔✔ Nonpolar covalent bond
Metallic bond
What is the molar mass of calcium carbonate (CaCO₃)?
✔✔ 100.09 g/mol
78.09 g/mol
56.08 g/mol
84.06 g/mol
Which of the following is a strong acid?
Sodium hydroxide
Ammonia
✔✔ Hydrochloric acid
Acetic acid
The equilibrium constant (K) for a reaction is a measure of:
The concentration of products only
The concentration of reactants only
2
,✔✔ The ratio of the concentration of products to reactants
The total concentration of all species involved
How many moles are in 22 grams of carbon dioxide (CO₂)?
✔✔ 0.5 moles
1 mole
2 moles
0.1 moles
Which of the following compounds is an example of a non-electrolyte?
Sodium chloride
✔✔ Sucrose
Hydrochloric acid
Potassium nitrate
In a chemical reaction, what happens to the energy of the system if the reaction is exothermic?
✔✔ The energy of the system decreases
The energy of the system increases
3
, The energy of the system remains constant
The energy of the system fluctuates
What type of reaction is represented by the equation: 2H₂ + O₂ → 2H₂O?
✔✔ Synthesis reaction
Decomposition reaction
Single replacement reaction
Double replacement reaction
What is the pH of a solution with a hydrogen ion concentration of 1 × 10⁻⁷ M?
7
✔✔ 7
4
10
Which of the following is true about an endothermic reaction?
It releases heat to the surroundings
✔✔ It absorbs heat from the surroundings
4
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