Q: How many molecules are in $0.0889$ g NaCl? ($M_{NaCl} = 58.44$ g/mol)

$9.17 \times 10^{20}$ molecules

Q: What is the wavelength of light when it has a frequency of $4.72 \times 10^{14} \\text{ s}^{-1}$? ($c = 3.00 \times 10^8 \\text{ m/s}$)

$6.36 \times 10^{-7} \\text{ m}$

Question 1

Which of the following best describes the role of carbon dioxide in the photosynthesis reaction: $6CO_2 + 6H_2O \rightarrow C_6H_{12}O_6 + 6O_2$?

Accepted Answer

It acts as the oxidizing agent

Question 2

A 17.3 g substance releases $29,836.36$ J of heat after a change in temperature from $84.7^\circ C$ to $57.0^\circ C$. What is its specific heat capacity? Round your answer to the nearest whole number.

Accepted Answer

$62 \text{ J/g}^\circ C$

Question 3

Which of the following is a homogeneous mixture?

Accepted Answer

Salt water

Question 4

How many molecules are in $0.0889$ g NaCl? ($M_{NaCl} = 58.44$ g/mol)

Accepted Answer

$9.17 	imes 10^{20}$ molecules

Question 5

Which of the following statements about electron affinity is correct?

Accepted Answer

Electron affinity is the energy released when an atom gains an electron

Question 6

A $4.5$ L gas at $2.40$ atm is at STP. What is its volume at STP?

Accepted Answer

$10.8$ L

Question 7

Which of the following elements would have the hardest time gaining an electron in a reaction?

Accepted Answer

Ne

Question 8

Which of the following transitions for the hydrogen atom electron emits a photon of the smallest energy?

Accepted Answer

$n = 5 \rightarrow n = 4$

Question 9

A student is performing a double displacement chemical reaction with silver chloride and potassium nitrate. If $0.25$ mol of silver chloride reacts with potassium nitrate, how many moles of the precipitate will form at the end of the reaction?

Accepted Answer

$0.25$ mol

Question 10

Which of the following molecules contains an equal number of sigma and pi bonds?

Accepted Answer

$C_2H_2$

Question 11

Which element has the highest ionization energy?

Accepted Answer

F

Question 12

What is the wavelength of light when it has a frequency of $4.72 	imes 10^{14} \text{ s}^{-1}$? ($c = 3.00 	imes 10^8 \text{ m/s}$)

Accepted Answer

$6.36 	imes 10^{-7} \text{ m}$

Question 13

Which of the following is the correct electron configuration for vanadium?

Accepted Answer

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

Question 14

A $2$ year old, $27$ pound child has to have a toxic reagent due to a kidney blockage. The amount of toxin is $1.0$ mg/kg body weight. What is the correct dosage in mg for this child?

Accepted Answer

$12.27$ mg

Question 15

Which of the following reactions is a combustion reaction?

Accepted Answer

Burning wood

Question 16

Which of the following statements about atomic theory is true?

Accepted Answer

Atoms combine in simple whole number ratios

Question 17

Which of the following is equivalent to the total heat content of a system?

Accepted Answer

Enthalpy

Question 18

Which of the following colors has the shortest wavelength on the visible light spectrum?

Accepted Answer

Blue

Question 19

Which of the following best describes the degree of the bond angle for all carbons in $CH_4$?

Accepted Answer

$109.5^\circ$

Question 20

Which of the following molecules contains an equal number of sigma and pi bonds?

Accepted Answer

$C_2H_2$

General Chemistry Final Exam Multiple Choice Practice: Comprehensive Study Notes

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