Q: What is the frequency of 540 nm red light in that universe?

$5.6 \times 10^{14} \ \mathrm{s}^{-1}$

Q: What is the frequency of a photon emitted from a hydrogen atom when an electron relaxes from the $n=2$ orbital to the $n=1$ orbital?

$2.47 \times 10^{15} \ \mathrm{s}^{-1}$

Q: To what speed must an electron be accelerated to attain a wavelength of $200$ picometers? (The mass of an electron is $9.11 \times 10^{-31}$ kg)

$3.6 \times 10^6 \ \mathrm{m/s}$

Q: What is the de Broglie wavelength of a $60$ kg person running at $10$ m/s?

$1.1 \times 10^{-35}$ \ \mathrm{m}$

Question 1

What is the frequency of 540 nm red light in that universe?

Accepted Answer

$5.6 	imes 10^{14} \ \mathrm{s}^{-1}$

Question 2

What is the electron configuration of a Magnesium ion in the $2+$ oxidation state?

Accepted Answer

$1s^2 2s^2 2p^6$

Question 3

What is the frequency of a photon emitted from a hydrogen atom when an electron relaxes from the $n=2$ orbital to the $n=1$ orbital?

Accepted Answer

$2.47 	imes 10^{15} \ \mathrm{s}^{-1}$

Question 4

The uncertainty principle states that you cannot know both the exact position and the exact __________ of a particle.

Accepted Answer

Momentum

Question 5

Which of the following is a valid set of quantum numbers?

Accepted Answer

$n=3, \ l=2, \ m_l=0, \ m_s=+1/2$

Question 6

How many angular nodes exist in a $d$ orbital?

Accepted Answer

2

Question 7

The electron configuration $1s^2 2s^2 2p^6 3s^2 3p^1$ corresponds to which element?

Accepted Answer

Al

Question 8

What two elements have the same number of $s$ electrons as $p$ electrons?

Accepted Answer

Magnesium and Oxygen

Question 9

Which is the correct net ionic equation for the reaction of aqueous ammonia with nitric acid?

Accepted Answer

$NH_3 (aq) + H^+ (aq) \rightarrow NH_4^+ (aq)$

Question 10

A pulse of electromagnetic radiation has a total energy of $2.5 \ \mathrm{J}$. How many photons are in this pulse if the wavelength is $540 \ \mathrm{nm}$?

Accepted Answer

$1.9 	imes 10^{19}$

Question 11

Which solution would contain 3 moles of ions for every mole of compound dissolved in water?

Accepted Answer

FeCl$_3$

Question 12

Which of the following compounds is a strong electrolyte when dissolved in water?

Accepted Answer

Ca(Br)$_2$

Question 13

To what speed must an electron be accelerated to attain a wavelength of $200$ picometers? (The mass of an electron is $9.11 	imes 10^{-31}$ kg)

Accepted Answer

$3.6 	imes 10^6 \ \mathrm{m/s}$

Question 14

At $40^{\circ}$C, which of the following liquids does NOT conduct electricity?

Accepted Answer

Water

Question 15

What is the net ionic reaction between HCl and AgNO$_3$?

Accepted Answer

$Cl^- (aq) + Ag^+ (aq) \rightarrow AgCl (s)$

Question 16

A $47.28$ mL sample of $4.35$ M H$_2$SO$_4$ was titrated with $13.00$ mL of KOH. What is the molarity of the initial KOH solution?

Accepted Answer

$15.82$ M

Question 17

What is the de Broglie wavelength of a $60$ kg person running at $10$ m/s?

Accepted Answer

$1.1 	imes 10^{-35}$ \ \mathrm{m}$

Question 18

If a solution of AgNO$_3$ is mixed with BaCl$_2$, what is the identity of the precipitate?

Accepted Answer

AgCl

Question 19

If $0.90$ grams of LiBrO$_2$ is dissolved in $86.80$ mL of water, what is the molarity of the solution?

Accepted Answer

$0.078$ M

Question 20

In the reaction of $25$ mL of $0.20$ M Pb(NO$_3$)$_2$ with excess KI, what mass of precipitate is formed during the reaction?

Accepted Answer

$0.84$ \ \mathrm{grams}$

General Chemistry Exam Review: Atomic Structure, Quantum Mechanics, Chemical Reactions, and Solution Chemistry

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