Ch.1 - Intro to General ChemistryWorksheetSee all chapters
All Chapters
Ch.1 - Intro to General Chemistry
Ch.2 - Atoms & Elements
Ch.3 - Chemical Reactions
BONUS: Lab Techniques and Procedures
BONUS: Mathematical Operations and Functions
Ch.4 - Chemical Quantities & Aqueous Reactions
Ch.5 - Gases
Ch.6 - Thermochemistry
Ch.7 - Quantum Mechanics
Ch.8 - Periodic Properties of the Elements
Ch.9 - Bonding & Molecular Structure
Ch.10 - Molecular Shapes & Valence Bond Theory
Ch.11 - Liquids, Solids & Intermolecular Forces
Ch.12 - Solutions
Ch.13 - Chemical Kinetics
Ch.14 - Chemical Equilibrium
Ch.15 - Acid and Base Equilibrium
Ch.16 - Aqueous Equilibrium
Ch. 17 - Chemical Thermodynamics
Ch.18 - Electrochemistry
Ch.19 - Nuclear Chemistry
Ch.20 - Organic Chemistry
Ch.22 - Chemistry of the Nonmetals
Ch.23 - Transition Metals and Coordination Compounds

Solution: A 40-lb container of peat moss measures 14 x 20 x 30 in. A 40-lb container of topsoil has a volume of 1.9 gal{ m gal}.Calculate the average density of peat moss in units of g/cm3.

Solution: A 40-lb container of peat moss measures 14 x 20 x 30 in. A 40-lb container of topsoil has a volume of 1.9 gal{ m gal}.Calculate the average density of peat moss in units of g/cm3.

Problem

A 40-lb container of peat moss measures 14 x 20 x 30 in. A 40-lb container of topsoil has a volume of 1.9 gal.

Calculate the average density of peat moss in units of g/cm3.

Solution

Density is defined as the mass of a substance contained per unit volume. In simpler words, density is a characteristic property of matter that defines how heavy or light it is. Heavier substances have greater densities than lighter substances.


The formula for density is:


<math xmlns="http://www.w3.org/1998/Math/MathML"><mi>d</mi><mi>e</mi><mi>n</mi><mi>s</mi><mi>i</mi><mi>t</mi><mi>y</mi><mo>&#xA0;</mo><mo>=</mo><mfrac><mrow><mo>&#xA0;</mo><mi>m</mi><mi>a</mi><mi>s</mi><mi>s</mi></mrow><mrow><mi>v</mi><mi>o</mi><mi>l</mi><mi>u</mi><mi>m</mi><mi>e</mi></mrow></mfrac></math>


Note that we need our density value in the units of g/cm3. So, we will be following these steps:

  • We will convert our mass (40 lb) to gram units.
  • We will convert the container dimensions (14 x 20 x 30 in) to cm units.
  • We will find the volume of the container from its dimensions.
  • We will use the mass and volume to calculate density.


So, let’s begin.


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