Q: What is the frequency of electromagnetic radiation with a wavelength of $$500\ \mathrm{nm}$$? (Speed of light $$c = 3.00 \times 10^8$\ \mathrm{m/s})$$

$$6.00 \times 10$$^{14}$$\ \mathrm{Hz}$$

Question 1

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

Accepted Answer

$$0.34\ \mathrm{M}$$

Question 2

Which of the following compounds is expected to be insoluble in water according to the solubility rules?

Accepted Answer

$$\mathrm{AgCl}$$

Question 3

A student mixes solutions of $$\mathrm{Ba(NO_3$)_2}$$ and $$\mathrm{Na_2SO_4}. $$What is the net ionic equation for the precipitation reaction that occurs?

Accepted Answer

$$\mathrm{Ba$$^{2+}$$(aq) + SO_4$^{2-}(aq) \rightarrow $$BaSO_4$$(s)}$$

Question 4

Which of the following acids is classified as a strong acid?

Accepted Answer

$$\mathrm{$$HNO_3$$}$$

Question 5

Calculate the final concentration when 100 mL of 0.50 M $$\mathrm{NaCl} is $$diluted to a final volume of 400 mL.

Accepted Answer

$$0.125\ \mathrm{M}$$

Question 6

Which of the following is a weak base according to Table 4.3?

Accepted Answer

$$\mathrm{NH_3$}$$

Question 7

Which of the following best describes the photoelectric effect?

Accepted Answer

The emission of electrons from a metal surface when light of sufficient frequency shines on it.

Question 8

What is the frequency of electromagnetic radiation with a wavelength of $$500\ \mathrm{nm}$$? (Speed of light $$c = 3.00 	imes 10^8$\ \mathrm{m/s})$$

Accepted Answer

$$6.00 	imes 10$$^{14}$$\ \mathrm{Hz}$$

Question 9

Which quantum number determines the shape of an orbital?

Accepted Answer

Angular momentum quantum number ($$l)$$

Question 10

Which of the following ions has the largest radius?

Accepted Answer

$$\mathrm{O$$^{2-}$$}$$

Question 11

Which element has the highest first ionization energy?

Accepted Answer

Neon

Question 12

Which of the following statements about electron affinity is correct?

Accepted Answer

Electron affinity generally increases across a period from left to right.

Question 13

Which of the following compounds would have the highest lattice energy?

Accepted Answer

$$\mathrm{MgO}$$

Question 14

What is the correct electron configuration for the $$\mathrm{Fe$$^{3+}$$}$$ ion?

Accepted Answer

$$[Ar]\ 3d^5$

Question 15

Which of the following is the correct formula for the oxide ion?

Accepted Answer

$$\mathrm{O$$^{2-}$$}$$

Question 16

A solution contains $$0.10\ \mathrm{M}$$ $$\mathrm{$$AgNO_3$$}$$ and $$0.10\ \mathrm{M}$$ $$\mathrm{NaCl}. $$Will a precipitate form? If so, what is it?

Accepted Answer

A precipitate of $$\mathrm{AgCl}$$ will form.

Question 17

Which of the following best explains why $$\mathrm{MgO}$$ has a higher lattice energy than $$\mathrm{NaCl}$$?

Accepted Answer

Because $$\mathrm{MgO}$$ has ions with higher charges.

Question 18

Which of the following is a redox reaction?

Accepted Answer

$$\mathrm{Zn(s) + 2HCl(aq) \rightarrow $$ZnCl_2$$(aq) + H_2$(g)}$$

Question 19

Which of the following elements has the smallest atomic radius?

Accepted Answer

Neon

General Chemistry: Solutions, Acids & Bases, and Atomic Structure Study Guide

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