Q: The calculated diameter of a carbon atom is about $$0.00000000034\ \mathrm{m}. In $$correct scientific notation, this is equal to:

$$3.4 \times 10$$^{-10}$$\ \mathrm{m}$$

Q: The atomic radius of a uranium atom is approximately $$175\ \mathrm{pm}. In $$correct scientific notation, this is:

$$1.75 \times 10$$^{-10}$$\ \mathrm{m}$$

Q: What is the frequency $$(\nu) in $$hertz of the photons emitted by a HeNe laser with a wavelength $$(\lambda) of$$ $$632.8\ \mathrm{nm}$$?

$$4.738 \times 10$$^{14}$$\ \mathrm{Hz}$$

Q: What is the energy $$(E) in $$joules of the $$514.5\ \mathrm{nm}$$ photons emitted by an argon-ion laser?

$$3.86 \times 10$$^{-19}$$\ \mathrm{J}$$

Question 1

Which of the following is an example of a quantitative observation?

Accepted Answer

The temperature of the liquid is $$60^\circ \mathrm{C}.$$

Question 2

Which set of mass measurements of an aspirin tablet is the most precise?

Accepted Answer

$$1.513\ \mathrm{g},\ 1.519\ \mathrm{g},\ 1.518\ \mathrm{g}$$

Question 3

The calculated diameter of a carbon atom is about $$0.00000000034\ \mathrm{m}. In $$correct scientific notation, this is equal to:

Accepted Answer

$$3.4 	imes 10$$^{-10}$$\ \mathrm{m}$$

Question 4

The deepest point in the Mariana Trench is approximately $$10\ \mathrm{km}. $$What is this depth in feet? ($$1\ \mathrm{mi} = 5280\ \mathrm{ft} = 1.609\ \mathrm{km})$$

Accepted Answer

$$17,500\ \mathrm{ft}$$

Question 5

On July 10, 1913, the world-record highest air temperature was recorded to be $$134^\circ \mathrm{F} at $$Furnace Creek Ranch in Death Valley, California. What is this temperature in degrees Celsius?

Accepted Answer

$$57^\circ \mathrm{C}$$

Question 6

Which of the following represents a chemical change?

Accepted Answer

Mercury(II) oxide is heated up and forms mercury metal and oxygen gas.

Question 7

The atomic radius of a uranium atom is approximately $$175\ \mathrm{pm}. In $$correct scientific notation, this is:

Accepted Answer

$$1.75 	imes 10$$^{-10}$$\ \mathrm{m}$$

Question 8

In any neutral atom, which statement is true?

Accepted Answer

The number of electrons equals the number of protons.

Question 9

What value should be reported for the total mass of three samples of iron weighing $$117.0\ \mathrm{g}$$, $$19.43\ \mathrm{g}$$, and $$6.1043\ \mathrm{g}$$?

Accepted Answer

$$142.5\ \mathrm{g}$$

Question 10

All of the following are true EXCEPT:

Accepted Answer

Ions are formed by changing the number of protons in an atom's nucleus.

Question 11

A $$^{35}_{17}\mathrm{Cl}$$ atom has ______ protons, ______ neutrons, and ______ electrons.

Accepted Answer

17; 18; 17

Question 12

A strontium-90 atom that has lost 2 electrons has ______ protons, ______ neutrons, and ______ electrons.

Accepted Answer

38; 52; 36

Question 13

Elements in group 17 (VIIA) are called:

Accepted Answer

Halogens

Question 14

What is the frequency $$(
u) in $$hertz of the photons emitted by a HeNe laser with a wavelength $$(\lambda) of$$ $$632.8\ \mathrm{nm}$$?

Accepted Answer

$$4.738 	imes 10$$^{14}$$\ \mathrm{Hz}$$

Question 15

What is the energy $$(E) in $$joules of the $$514.5\ \mathrm{nm}$$ photons emitted by an argon-ion laser?

Accepted Answer

$$3.86 	imes 10$$^{-19}$$\ \mathrm{J}$$

Question 16

Determine the wavelength of the line in the hydrogen atomic emission spectrum corresponding to the $$n_{	ext{final}} = 4 to$$ $$n_{	ext{initial}} = 3$$ transition.

Accepted Answer

$$1875\ \mathrm{nm}$$

Question 17

How many orbitals are possible for the $$n = 3$$ shell?

Accepted Answer

9

Question 18

Which subshell has only five orbitals?

Accepted Answer

$$l = 2$$

Question 19

What are the principal and angular momentum quantum numbers for a $$4f$$ orbital?

Accepted Answer

$$n = 4,\ l = 3$$

Question 20

What is the orbital designation for an electron with the quantum numbers $$n = 3$$, $$l = 2$$?

Accepted Answer

3d

General Chemistry: Fundamental Concepts and Practice Questions

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