Q: Convert $1 \ \mu\mathrm{m}$ to meters.

$1 \times 10^{-6} \ \mathrm{m}$

Q: Arrange the following spectral regions in order of increasing energy: microwave, infrared, visible, ultraviolet.

microwave < infrared < visible < ultraviolet

Q: A dipole moment ($\mu$) is calculated as the product of charge ($Q$) and distance. If a molecule has a charge separation of $1.60 \times 10^{-19} \ \mathrm{C}$ over $1.00 \times 10^{-10} \ \mathrm{m}$, what is its dipole moment in Debye? ($1 \ \mathrm{D} = 3.336 \times 10^{-30} \ \mathrm{C} \cdot \mathrm{m}$)

$4.80 \times 10^{-2} \ \mathrm{D}$

Q: Given the following spheres: $r = 215 \ \mathrm{pm}$, $r = 197 \ \mathrm{pm}$, $r = 114 \ \mathrm{pm}$, which represents a $Sr$ atom, a $Br$ atom, and a $Ca$ atom?

$Sr$ (215 pm) > $Br$ (197 pm) > $Ca$ (114 pm)

Q: An Eastern diamondback rattlesnake was milked until $0.135 \ \mathrm{g}$ of venom was obtained. The venom was administered in equal portions to $560$ mice with an average weight of $0.71 \ \mathrm{oz}$, and exactly half the mice died. What is the $LD_{50}$ (in $\mathrm{g/kg}$) for the snake venom in mice? ($1 \ \mathrm{kg} = 2.2046 \ \mathrm{lb}$, $1 \ \mathrm{lb} = 16 \ \mathrm{oz}$)

$2.4 \times 10^{-1} \ \mathrm{g/kg}$

Question 1

Which of the following elements is known to have an anomalous electron configuration due to stability associated with half-filled or fully-filled subshells?

Accepted Answer

Chromium ($Cr$)

Question 2

A sample of chloroform has a density of $1.4832 \ \mathrm{g/mL}$ at $20^\circ \mathrm{C}$. How many milliliters are needed to obtain $102.5 \ \mathrm{g}$ of chloroform?

Accepted Answer

$69.12 \ \mathrm{mL}$

Question 3

Which of the following best describes the difference between accuracy and precision in a set of measurements?

Accepted Answer

Accuracy refers to how close measurements are to the true value, while precision refers to how close measurements are to each other.

Question 4

If $1.4\%$ of the mass of a human body is calcium, how many kilograms of calcium are present in a $173$-pound person? ($1 \ \mathrm{kg} = 2.2046 \ \mathrm{lb}$)

Accepted Answer

$1.1 \ \mathrm{kg}$

Question 5

How many significant figures are in the answer to the calculation $23.1 + 0.5588 + 17$?

Accepted Answer

Two

Question 6

Convert $-28.0^\circ \mathrm{F}$ to Celsius using the formula $T(^\circ \mathrm{C}) = \frac{5}{9} 	imes (T(^\circ \mathrm{F}) - 32)$.

Accepted Answer

$-33.3^\circ \mathrm{C}$

Question 7

Convert $1 \ \mu\mathrm{m}$ to meters.

Accepted Answer

$1 	imes 10^{-6} \ \mathrm{m}$

Question 8

At room temperature, an element is shiny, silver-colored, and shatters when struck with a hammer. It is a poor conductor of electricity. What type of element is this most likely to be?

Accepted Answer

Semimetal (metalloid)

Question 9

Which group of elements does the shaded area in the periodic table (Group 1) indicate?

Accepted Answer

Alkali metals

Question 10

How many atoms of copper are in a penny made of pure copper (atomic number $29$) and weighing $2.15 \ \mathrm{g}$? ($N_A = 6.022 	imes 10^{23} \ \mathrm{atoms/mol}$, molar mass of Cu $= 63.55 \ \mathrm{g/mol}$)

Accepted Answer

$2.04 	imes 10^{22}$ atoms

Question 11

Which orbital-filling diagram represents the anomalous ground state of chromium ($Cr$)?

Accepted Answer

$[Ar] \ 4s^1 \ 3d^5$

Question 12

For the fourth-shell orbital shown below, what are the principal quantum number $n$ and the angular momentum quantum number $l$?

Accepted Answer

$n = 4, \ l = 2$

Question 13

Which of the following is NOT a valid set of quantum numbers?

Accepted Answer

$n = 3, \ l = 2, \ m_l = 3, \ m_s = 1/2$

Question 14

Arrange the following spectral regions in order of increasing energy: microwave, infrared, visible, ultraviolet.

Accepted Answer

microwave < infrared < visible < ultraviolet

Question 15

Write the electron configuration of nickel ($Ni$, atomic number $28$) using shorthand notation.

Accepted Answer

$[Ar] \ 4s^2 \ 3d^8$

Question 16

A dipole moment ($\mu$) is calculated as the product of charge ($Q$) and distance. If a molecule has a charge separation of $1.60 	imes 10^{-19} \ \mathrm{C}$ over $1.00 	imes 10^{-10} \ \mathrm{m}$, what is its dipole moment in Debye? ($1 \ \mathrm{D} = 3.336 	imes 10^{-30} \ \mathrm{C} \cdot \mathrm{m}$)

Accepted Answer

$4.80 	imes 10^{-2} \ \mathrm{D}$

Question 17

Which of the following elements has the largest atomic radius?

Accepted Answer

Potassium ($K$)

Question 18

Given the following spheres: $r = 215 \ \mathrm{pm}$, $r = 197 \ \mathrm{pm}$, $r = 114 \ \mathrm{pm}$, which represents a $Sr$ atom, a $Br$ atom, and a $Ca$ atom?

Accepted Answer

$Sr$ (215 pm) > $Br$ (197 pm) > $Ca$ (114 pm)

Question 19

An Eastern diamondback rattlesnake was milked until $0.135 \ \mathrm{g}$ of venom was obtained. The venom was administered in equal portions to $560$ mice with an average weight of $0.71 \ \mathrm{oz}$, and exactly half the mice died. What is the $LD_{50}$ (in $\mathrm{g/kg}$) for the snake venom in mice? ($1 \ \mathrm{kg} = 2.2046 \ \mathrm{lb}$, $1 \ \mathrm{lb} = 16 \ \mathrm{oz}$)

Accepted Answer

$2.4 	imes 10^{-1} \ \mathrm{g/kg}$

General Chemistry I: Atomic Structure, Units, Periodic Table, and Measurement

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