Q: Which of the following is a redox reaction?

$$\text{Zn} + \text{CuSO}_4 \rightarrow \text{ZnSO}_4 + \text{Cu}$$

Question 1

A student measures the mass of a sample as 12.30 g and its volume as 4.0 mL. What is the correct density, reported with the proper number of significant figures?

Accepted Answer

$$3.1\ 	ext{g/mL}$$

Question 2

Which of the following statements about isotopes is TRUE?

Accepted Answer

Isotopes have the same number of protons but different numbers of neutrons.

Question 3

The emission spectrum of hydrogen shows discrete lines. According to the Bohr model, which equation describes the energy difference between two levels?

Accepted Answer

$$\Delta E = -R_H \left( \dfrac{1}{n_f^2$} - \dfrac{1}{n_i^2$} \right)$$

Question 4

Which set of quantum numbers is NOT allowed for an electron in an atom?

Accepted Answer

$$n=2,\ l=2,\ m_l=0,\ m_s=+\dfrac{1}{2}$$

Question 5

Which element has the highest first ionization energy?

Accepted Answer

Neon ($$	ext{Ne})$$

Question 6

What is the electron configuration for the $$	ext{Fe}^{2+}$$ ion?

Accepted Answer

$$[	ext{Ar}]\ 3d^6$

Question 7

Which compound is ionic?

Accepted Answer

$$	ext{NaCl}$$

Question 8

Which molecule has a trigonal planar shape according to VSEPR theory?

Accepted Answer

$$	ext{BF}_3$$

Question 9

Which atom in the following Lewis structure for $$	ext{NO}_3^-$$ has a formal charge of $$+1$$?

Accepted Answer

The central nitrogen atom

Question 10

What is the hybridization of the central atom in $$	ext{CH}_4$$?

Accepted Answer

$$sp^3$$

Question 11

A reaction mixture contains 2.0 mol $$	ext{H}_2$$ and 1.0 mol $$	ext{O}_2. $$According to the reaction $$2	ext{H}_2 + 	ext{O}_2 ightarrow 2	ext{H}_2	ext{O}$$, what is the limiting reactant?

Accepted Answer

$$	ext{O}_2$$

Question 12

What is the molarity of a solution made by dissolving 10.0 g of $$	ext{NaCl} in $$enough water to make 250 mL of solution? ($$	ext{NaCl}$$ molar mass = $$58.44\ 	ext{g/mol})$$

Accepted Answer

$$0.68\ 	ext{M}$$

Question 13

Which of the following is a redox reaction?

Accepted Answer

$$	ext{Zn} + 	ext{CuSO}_4 ightarrow 	ext{ZnSO}_4 + 	ext{Cu}$$

Question 14

In a coffee-cup calorimeter, which equation is used to calculate the enthalpy change at constant pressure?

Accepted Answer

$$\Delta H = q_p$$

Question 15

Which of the following statements about bond dissociation energy is TRUE?

Accepted Answer

Bond dissociation energy is the energy required to break a bond in a molecule.

Question 16

A reaction has $$\Delta H = -250\ 	ext{kJ}. $$Which statement best describes this reaction?

Accepted Answer

The reaction is exothermic and releases heat.

Question 17

A sample of gas occupies 2.0 L at 1.0 atm and 300 K. What will be its volume at 2.0 atm and 300 K?

Accepted Answer

$$1.0\ 	ext{L}$$

Question 18

According to the kinetic molecular theory, which statement explains why gases can be compressed?

Accepted Answer

Gas particles are far apart relative to their size.

Question 19

A mixture contains $$2.0$$ mol $$	ext{O}_2$$ and $$3.0$$ mol $$	ext{N}_2 at a $$total pressure of $$5.0$$ atm. What is the partial pressure of $$	ext{O}_2$$?

Accepted Answer

$$2.0\ 	ext{atm}$$

CH101-003 Spring 2026 Final Exam Study Guide: General Chemistry I

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