Question 1

Which of the following molecules is nonpolar due to its molecular geometry?

Accepted Answer

$\mathrm{CO_2}$

Question 2

How many valence electrons are present in an atom with the electron configuration $1s^2\ 2s^2\ 2p^6\ 3s^2\ 3p^5$?

Accepted Answer

5

Question 3

A solution has a density of $0.95\ \mathrm{g/mL}$. What is the mass of $100.0\ \mathrm{mL}$ of this solution?

Accepted Answer

$95.0\ \mathrm{g}$

Question 4

Which scientist is credited with the discovery of the electron?

Accepted Answer

J.J. Thomson

Question 5

Which of the following compounds contains both ionic and covalent bonds?

Accepted Answer

$\mathrm{NaNO_3}$

Question 6

What is the empirical formula for a compound with 78% Boron and 22% Nitrogen by mass?

Accepted Answer

$\mathrm{B_3N}$

Question 7

A sample of gas occupies $20.0\ \mathrm{L}$ at $27.0^\circ\mathrm{C}$ and $1.00\ \mathrm{atm}$. What will be its volume at $127.0^\circ\mathrm{C}$ and $1.00\ \mathrm{atm}$?

Accepted Answer

$27.3\ \mathrm{L}$

Question 8

Which of the following is the correct balanced equation for the complete combustion of methane?

Accepted Answer

$\mathrm{CH_4} + 2\mathrm{O_2} \rightarrow \mathrm{CO_2} + 2\mathrm{H_2O}$

Question 9

What is the molarity of a solution with $7.45\ \mathrm{g}$ of $\mathrm{NaCl}$ in $100.0\ \mathrm{mL}$ of water? ($M_{\mathrm{NaCl}} = 58.44\ \mathrm{g/mol}$)

Accepted Answer

$1.28\ \mathrm{M}$

Question 10

Which of the following statements about the reaction of sodium with water is correct?

Accepted Answer

Hydrogen gas and heat are released

Question 11

A sample contains $12.0\ \mathrm{g}$ of carbon and the rest is oxygen. If the total mass is $32.0\ \mathrm{g}$, what is the empirical formula?

Accepted Answer

$\mathrm{CO_2}$

Question 12

Which of the following is the excess reactant when $5.0\ \mathrm{mol}$ of $\mathrm{H_2}$ reacts with $20.0\ \mathrm{mol}$ of $\mathrm{Cl_2}$?

Accepted Answer

$\mathrm{Cl_2}$

Question 13

What is the oxidation state of sulfur in $\mathrm{H_2SO_4}$?

Accepted Answer

+6

Question 14

Which of the following is a correct statement about the behavior of an ideal gas?

Accepted Answer

At constant pressure and temperature, the volume is directly proportional to the number of moles

Question 15

Which of the following is the correct net ionic equation for the reaction between $\mathrm{AgNO_3}$ and $\mathrm{NaCl}$ in aqueous solution?

Accepted Answer

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

Question 16

What is the mass of water produced from the complete combustion of $5.00\ \mathrm{L}$ of $\mathrm{H_2}$ gas at STP?

Accepted Answer

$4.49\ \mathrm{g}$

Question 17

Which of the following best describes the shape of a $\mathrm{CH_4}$ molecule?

Accepted Answer

Tetrahedral

Question 18

Which of the following is a redox reaction?

Accepted Answer

$\mathrm{2H_2} + \mathrm{O_2} \rightarrow 2\mathrm{H_2O}$

Question 19

Which of the following is the correct electron configuration for a neutral atom of chlorine?

Accepted Answer

$1s^2\ 2s^2\ 2p^6\ 3s^2\ 3p^5$

Question 20

Which of the following is a property of acids?

Accepted Answer

They turn blue litmus paper red

General Chemistry 100: Comprehensive Study Guide

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