Question 1

A car travels at 3060 miles per hour. What is this speed in meters per second? (1 mi = 1.609 km)

Accepted Answer

1390 m/s

Question 2

What is the percent by mass of gold (Au) in $Au_2I_3$?

Accepted Answer

65.90%

Question 3

Which of the following oxyanions is incorrectly named?

Accepted Answer

$SO_3^{2-}$; sulfite

Question 4

Which of the following is an incorrect representation for a neutral atom?

Accepted Answer

$^{40}_{29}Cu$

Question 5

Which of the following acids is incorrectly named?

Accepted Answer

Perbromic Acid, HBrO$_4$

Question 6

How many total electrons are there in the chlorite anion?

Accepted Answer

20

Question 7

Which of the following must be present in an ion?

Accepted Answer

An electron

Question 8

What is the molar mass of potassium nitrite ($KNO_2$)?

Accepted Answer

93.0 g/mol

Question 9

For the reaction: $CH_4(g) + Br_2(l) \rightarrow CBr_4(s) + HBr(g)$, what is the coefficient for bromine ($Br_2$) when the reaction is balanced?

Accepted Answer

4

Question 10

What is the percentage of nitrogen, by mass, in calcium nitrate ($Ca(NO_3)_2$)?

Accepted Answer

17.1%

Question 11

Cyclohexane, a commonly used organic solvent, is 85.6% C and 14.4% H by mass. What is the empirical formula?

Accepted Answer

$CH_2$

Question 12

In the combustion of the hydrocarbon $C_4H_{10}$, what is the coefficient for $O_2$ when the reaction is balanced?

Question 13

Propane, $C_3H_8$, is a common fuel used for cooking and home heating. What mass of $O_2$ is consumed in the combustion of 1.00 g of propane?

Accepted Answer

3.63 g

Question 14

Molten gallium reacts with arsenic to form the semiconductor gallium arsenide, $GaAs$, used in light emitting diodes and solar cells: $Ga(l) + As(s) \rightarrow GaAs(s)$. If 4.00 g of gallium is reacted with 5.50 g of arsenic, how many grams of the excess reactant are left at the end of the reaction?

Accepted Answer

1.20 g As

Question 15

Both titanium and lead have been used as whitening sources for paint. The density of titanium is 4.506 g/cm$^3$; the density of lead is 11.34 g/cm$^3$. How many times heavier would one expect 2 gallons of lead powder to be compared to 2 gallons of titanium powder?

Accepted Answer

2.517 times heavier

Question 16

An electron has a charge of $1.602 	imes 10^{-19}$ coulombs (C), a wire with a current of 4.0 amperes (C/s) moving through it has a frequency of how many Hz (s$^{-1}$)?

Accepted Answer

$2.5 	imes 10^{19}$ Hz

Question 17

In an alternate universe there are only two naturally occurring isotopes of iron: $^{56}Fe$ (64.5% abundance) and $^{62}Fe$ (35.5% abundance). Given this information, what is the atomic weight of iron in this alternate universe?

Accepted Answer

58.1 amu

Question 18

$^{24}Mg$ is the most abundant isotope of Magnesium with 78.99% abundance. There are two additional naturally occurring Magnesium isotopes $^{25}Mg$ and $^{26}Mg$. What is the percent abundance of $^{25}Mg$? Assume the atomic masses are the mass numbers of each isotope.

Accepted Answer

11.5 %

Question 19

If 6.0 grams of Beryllium Fluoride is reacted with excess Aluminum Phosphate to give Beryllium Phosphate and AlF$_3$, how many grams of Beryllium Phosphate are produced?

Accepted Answer

9.2 grams

Question 20

How many moles are in 12.0 g of LiCl?

Accepted Answer

0.283 moles

General Chemistry 1201: Key Concepts and Problem-Solving Guide

Study Guide - Practice Questions

Study Guide - Flashcards