Question 1

Which of the following best describes an oxidation reaction?

Accepted Answer

A reaction in which a substance loses electrons.

Question 2

A 25.0 mL sample of 0.200 M NaOH is titrated with 0.100 M HCl. What volume of HCl (in mL) is required to reach the equivalence point? Use the equation: $$\mathrm{NaOH} + \mathrm{HCl} \rightarrow \mathrm{NaCl} + \mathrm{H}_2\mathrm{O}$$

Accepted Answer

50.0 mL

Question 3

Which of the following statements about enthalpy ($$\Delta H) is $$correct?

Accepted Answer

$$\Delta H is a $$state function and depends only on the initial and final states of the system.

Question 4

A solution is prepared by diluting 50.0 mL of 6.00 M HCl to a final volume of 300.0 mL. What is the final concentration of HCl?

Accepted Answer

1.00 M

Question 5

Which scientist proposed that energy is quantized and can be emitted or absorbed only in discrete amounts called quanta?

Accepted Answer

Max Planck

Question 6

A gas expands from 2.0 L to 5.0 L against a constant external pressure of 1.5 atm. Calculate the work done by the gas. ($$W = -P\Delta V$$; 1 L·atm = 101.3 J)

Accepted Answer

$$-455.9 J$$

Question 7

Which of the following best describes the relationship between frequency ($$
u$$), wavelength ($$\lambda$$), and the speed of light ($$c$$)?

Accepted Answer

$$c = 
u \lambda$$

Question 8

Which of the following is NOT a state function?

Accepted Answer

Work ($$W)$$

Question 9

A reaction has $$\Delta H = -250 kJ. If 3.00 $$mol of the reactant is consumed and the reaction is written for 2.00 mol, what is the total enthalpy change?

Accepted Answer

$$-375 kJ$$

Question 10

Which of the following best describes the uncertainty principle?

Accepted Answer

It is impossible to know both the exact position and exact momentum of an electron simultaneously.

Question 11

Which of the following is the correct set of quantum numbers for a 3p electron?

Accepted Answer

$$n=3,\ l=1,\ m_l=0,\ m_s=+\frac{1}{2}$$

Question 12

A student mixes 100.0 mL of 1.00 M HCl with 100.0 mL of 1.00 M NaOH in a coffee-cup calorimeter. The temperature rises by 5.7°C. If the specific heat of the solution is $$4.18\ \mathrm{J/g\cdot ^\circ C}$$ and the density is $$1.00\ \mathrm{g/mL}$$, what is the heat evolved ($$q$$)?

Accepted Answer

$$2390 J$$

Question 13

Which of the following statements about probability density and radial probability is correct?

Accepted Answer

Probability density gives the probability of finding an electron at a specific point in space, while radial probability gives the probability of finding an electron at a certain distance from the nucleus.

Question 14

Which of the following reactions is a reduction reaction?

Accepted Answer

$$\mathrm{Fe}^{3+} + 3e^- \rightarrow \mathrm{Fe}$$

Question 15

Which of the following best describes the shape of a d orbital?

Accepted Answer

Cloverleaf-shaped

Question 16

A photon has a wavelength of $$4.00 	imes 10$$^{-7}$$ m. What is its frequency? (c = 3.00$$ 	imes $$10^8 m/s)$$

Accepted Answer

$$7.50 	imes 10$$^{14}$$ Hz

Question 17

Which of the following is a correct application of Hess's Law?

Accepted Answer

The enthalpy change of a reaction is the sum of the enthalpy changes of the individual steps into which the reaction can be divided.

Question 18

Which of the following best explains the phenomenon of light diffraction?

Accepted Answer

Light bends around obstacles and spreads out after passing through small openings.

Question 19

If the energy required to move an electron from $$n=2 to$$ $$n=4 in a $$hydrogen atom is $$E$$, what is the energy released when the electron falls from $$n=4 to$$ $$n=2$$?

Accepted Answer

$$E$$

Question 20

Which of the following is the correct hierarchical order of the four quantum numbers?

Accepted Answer

Principal $$(n) \rightarrow$$ Azimuthal $$(l) \rightarrow$$ Magnetic $$(m_l) \rightarrow$$ Spin $$(m_s)$$

General Chemistry II: Study Guide for Chapters 5, 7, and 8

Guida di studio - Domande di pratica

Study guide - Flashcard