Q: Calculate the energy of a photon with a wavelength of 500 nm. ($$h = 6.626 \times 10$$^{-34}$$\ \mathrm{J\cdot s}$$, $$c = 3.00 \times 10^8$\ \mathrm{m/s})$$

$$3.97 \times 10$$^{-19}$$\ \mathrm{J}$$

Question 1

Which of the following best explains why sodium chloride (NaCl) conducts electricity when dissolved in water, but not in its solid form?

Accepted Answer

NaCl dissociates into Na+ and Cl- ions in water, which are free to move and carry charge.

Question 2

A solution is prepared by dissolving 10.0 g of NaCl in enough water to make 500 mL of solution. What is the molarity (M) of the solution? (Molar mass of NaCl = 58.44 g/mol)

Accepted Answer

$$0.342\ \mathrm{M}$$

Question 3

Which of the following compounds will form a precipitate when mixed with a solution of AgNO$$_3$$?

Accepted Answer

NaCl

Question 4

Which of the following is a correct net ionic equation for the reaction between aqueous solutions of Pb(NO$$_3$$)$$_2$$ and KI?

Accepted Answer

$$\mathrm{Pb}^{2+}(aq) + 2\ \mathrm{I}^-(aq) \rightarrow \mathrm{PbI}_2(s)$$

Question 5

Which of the following is a strong acid?

Accepted Answer

Hydrochloric acid, HCl

Question 6

A 25.0 mL sample of 0.100 M HNO$$_3 is $$neutralized by Ca(OH)$$_2. $$What volume of 0.0500 M Ca(OH)$$_2 is $$required? (Balanced equation: $$2\ \mathrm{HNO}_3(aq) + \mathrm{Ca(OH)}_2(aq) \rightarrow \mathrm{Ca(NO}_3)_2(aq) + 2\ \mathrm{H}_2\mathrm{O}(\ell))$$

Accepted Answer

$$25.0\ \mathrm{mL}$$

Question 7

Which of the following statements about the periodic trend in atomic radius is correct?

Accepted Answer

Atomic radius decreases from left to right across a period.

Question 8

Which of the following ions is isoelectronic with neon (Ne)?

Accepted Answer

$$\mathrm{Mg}^{2+}$$

Question 9

Which of the following best describes the trend in first ionization energy across a period from left to right?

Accepted Answer

It increases due to increasing effective nuclear charge.

Question 10

Which of the following sets of quantum numbers is valid for an electron in a 3d orbital?

Accepted Answer

$$n = 3,\ \ell = 2,\ m_\ell = 0,\ m_s = +\frac{1}{2}$$

Question 11

Which of the following best explains why the lead levels in Flint, Michigan's water increased after switching water sources?

Accepted Answer

The new water source had more chloride ions, which increased pipe corrosion and lead dissolution.

Question 12

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

Accepted Answer

$$\lambda 
u = c$$

Question 13

Which of the following regions of the electromagnetic spectrum has the shortest wavelength?

Accepted Answer

Gamma rays

Question 14

Calculate the energy of a photon with a wavelength of 500 nm. ($$h = 6.626 	imes 10$$^{-34}$$\ \mathrm{J\cdot s}$$, $$c = 3.00 	imes 10^8$\ \mathrm{m/s})$$

Accepted Answer

$$3.97 	imes 10$$^{-19}$$\ \mathrm{J}$$

Question 15

Which of the following best describes the Pauli Exclusion Principle?

Accepted Answer

No two electrons in an atom can have the same set of four quantum numbers.

Question 16

Which of the following is the correct order of atomic size for the elements O, P, and S?

Accepted Answer

P \u003e S \u003e O

Question 17

Which of the following best describes a redox reaction?

Accepted Answer

A reaction in which electrons are transferred between species.

Question 18

Which of the following metals will NOT react with hydrochloric acid to produce hydrogen gas, based on the activity series?

Accepted Answer

Copper (Cu)

Question 19

A solution is prepared by diluting 10.0 mL of 2.00 M NaOH to a final volume of 100.0 mL. What is the final concentration?

Accepted Answer

$$0.20\ \mathrm{M}$$

Aqueous Chemistry and Periodic Properties: Study Guide for General Chemistry

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