# Chapter 1: Matter and Measurement Iron has a density of 7.9 g/mL.

Chapter 1: Matter and Measurement
Iron has a density of 7.9 g/mL. What is the volume of a block of iron with a mass of 800.0 kg? If one cubic meter is equal to 1000 Liters, what is the volume of the block in cubic meters?
Chapter 2: Atoms and the Periodic Table
Complete the following table (include the atomic number and charge in the Symbol column):
Name
Symbol
Atomic number
Mass Number
Number of neutrons
Number of Electrons
3H
sodium-22
22Na+
10
12
24
12
carbon-12
5
4He
Chapter 3: Ionic Bonds
Write the formula for the ionic compound formed from the sulfite anion (SO32-) and each cation, then write the name of the formula:
a. K+
b. Al3+
Chapter 4: Covalent Bonds
Write the total number of valence electrons for the following molecules:
a. H2
b. H2CO
Chapter 6: Energy, Reaction Rates, and Equilibrium
Methanol (CH4O), which is used as a fuel in race cars, burns in oxygen to form carbon dioxide and water, according to the following reaction:
2 CH4O + 3 O2 ⟶ 2 CO2 + 4 H2O ΔH= -174 kcal/mol
a. How much energy is released when 4.5 mol of methanol reacts?
b. How much energy is released when 0.2 mol of H2O reacts?
Chapter 8: Solutions
What is the molarity of a HCl solution if 0.036 L of solution contain 0.4 g of HCl?
Chapter 9: Acids and Bases
Calculate the value of [H3O+] from the given [OH-] and find the pH. Then label the solution as acidic or basic.
a. [OH-] = 10-10 M
b. [OH-] = 5.1 x 10-3 M
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