Question 1

Which wavelength of light has the lowest frequency? (Assume the speed of light is constant.)

Accepted Answer

$$1 \ 	ext{mm}$$

Question 2

Which kind of electromagnetic radiation contains the lowest energy per photon?

Accepted Answer

microwaves

Question 3

Which set of three quantum numbers $$(n, \ell, m_\ell)$$ does NOT specify an orbital in a hydrogen atom or any atom for that matter?

Accepted Answer

$$2, 2, 0$$

Question 4

How many $$3p or$$ $$p$$ orbitals exist in a single atom (i.e., maximum possible)?

Accepted Answer

3

Question 5

An isotope of an element contains 52 protons and 72 neutrons. What is the symbol for it?

Accepted Answer

$$^{124}_{52}	ext{Te}$$

Question 6

How many electrons are in the $$Cr^{3+}$$ ion?

Accepted Answer

Question 7

Classify the following substance: chocolate chip cookie.

Accepted Answer

Heterogeneous mixture

Question 8

What is the charge on a titanium ion that has 20 electrons?

Accepted Answer

$$4+$$

Question 9

What is the isotope symbol of the chlorine isotope with 18 neutrons?

Accepted Answer

$$^{37}_{17}	ext{Cl}$$

Question 10

How many protons, electrons, and neutrons are in an atom of $$^{52}_{24}	ext{Cr}$$?

Accepted Answer

24, 24, 28

Question 11

A pure silver ring contains $$1.20 	imes 10$$^{24}$$ silver atoms. How many moles of silver atoms is it?

Accepted Answer

$$1.99 \ 	ext{mol}$$

Question 12

Calculate the amount (i.e., moles) of copper in a $$41.7$$ gram copper sheet. (Molar mass of Cu = $$63.55 \ 	ext{g/mol})$$

Accepted Answer

$$0.656 \ 	ext{mol}$$

Question 13

Classify the following substance: chicken noodle soup.

Accepted Answer

Heterogeneous mixture

Question 14

The soft drink 'Gatorade' would be best classified as:

Accepted Answer

Solution

Question 15

The helium in a balloon labeled 'Happy Birthday' would be classified as:

Accepted Answer

Element

Question 16

Pepperoni pizza would be classified as:

Accepted Answer

Heterogeneous mixture

Question 17

What is the amount, in moles, of $$18.1 g Li$$?

Accepted Answer

$$2.61 \ 	ext{mol}$$

Question 18

What is the mass, in grams, of $$0.682$$ mol Xe? (Molar mass Xe = $$131.3 \ 	ext{g/mol})$$

Accepted Answer

$$89.6 \ 	ext{g}$$

Question 19

How many $$d$$ orbitals $$(\ell = 2)$$ exist in a single atom (i.e., maximum possible)?

Accepted Answer

5

Question 20

What is the mass of a $$0.875 L $$sample of a liquid with a density of $$0.841 \ 	ext{g/mL}$$?

Accepted Answer

$$736 \ 	ext{g}$$

General Chemistry I: Foundational Concepts and Applications

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