Q: What is the frequency of light with a wavelength of $$500\ \mathrm{nm}$$? (Use $$c = 3.0 \times 10^8$\ \mathrm{m/s})$$

$$6.0 \times 10$$^{14}$$\ \mathrm{s}^{-1}$$

Question 1

Which of the following compounds will form a precipitate when aqueous solutions of Na2SO4 and BaCl2 are mixed?

Accepted Answer

BaSO4

Question 2

Which of the following is a strong electrolyte in aqueous solution?

Accepted Answer

NaCl

Question 3

What is the net ionic equation for the reaction between aqueous solutions of HCl and NaOH?

Accepted Answer

$$\mathrm{H^+ (aq) + OH^- (aq) \rightarrow H_2O (l)}$$

Question 4

Which of the following ions is a spectator ion in the reaction between AgNO3(aq) and NaCl(aq)?

Accepted Answer

$$\mathrm{Na^+}$$

Question 5

A solution is prepared by dissolving 0.50 mol of Na2SO4 in enough water to make 1.0 L of solution. What is the concentration of Na+ ions in the solution?

Accepted Answer

$$1.0\ \mathrm{M}$$

Question 6

Which of the following compounds is insoluble in water according to the solubility guidelines?

Accepted Answer

BaSO4

Question 7

What is the oxidation number of sulfur in $$\mathrm{SO_4$^{2-}}$$?

Accepted Answer

+6

Question 8

Which of the following statements best describes a reduction reaction?

Accepted Answer

A substance gains electrons

Question 9

How many moles of HCl are required to completely neutralize 50.0 mL of 0.200 M NaOH?

Accepted Answer

0.0100 mol

Question 10

A student dilutes 25.0 mL of 2.00 M HNO3 to a final volume of 100.0 mL. What is the final concentration?

Accepted Answer

$$0.50\ \mathrm{M}$$

Question 11

Which of the following has the highest energy per photon?

Accepted Answer

Ultraviolet light at 200 nm

Question 12

What is the frequency of light with a wavelength of $$500\ \mathrm{nm}$$? (Use $$c = 3.0 	imes 10^8$\ \mathrm{m/s})$$

Accepted Answer

$$6.0 	imes 10$$^{14}$$\ \mathrm{s}^{-1}$$

Question 13

Which quantum number defines the shape of an atomic orbital?

Accepted Answer

Angular momentum quantum number ($$l)$$

Question 14

How many electrons can occupy the 3p subshell?

Accepted Answer

6

Question 15

Which of the following electron configurations represents a violation of the Pauli Exclusion Principle?

Accepted Answer

$$1s^2$$\ $$2s^2$$\ $$2p^7$$

Question 16

What is the condensed electron configuration for calcium (Ca, atomic number 20)?

Accepted Answer

$$[Ar]\ 4s^2$

Question 17

Which of the following transitions in the hydrogen atom will emit the highest energy photon?

Accepted Answer

$$n=2 \rightarrow n=1$$

Question 18

Which of the following is NOT a strong acid?

Accepted Answer

HF

Question 19

What is the possible set of quantum numbers for the last electron in a phosphorus atom ($$Z=15$$)?

Accepted Answer

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

Question 20

Which of the following best describes the concept of quantized energy in the Bohr model?

Accepted Answer

Electrons can only occupy specific energy levels

Exam 2 Study Guide: Reactions in Aqueous Solution & Electronic Structure of Atoms

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