Loading

Chemistry - Molecules and their Composition

Learn more about molecular formulas, empirical formulas, and Avogadro's number with this free chemistry course.

Chemistry
Free Course
A molecule is a group of two or more atoms that bind together using chemical bonds. They may be from one or multiple elements and it is the ratio, or mass composition, of each molecule that gives the molecular compound its chemical characteristics. In this free online science course, you will learn about molecules and how they are composed of various elements in mass, atoms, and ratios. You will also look into Avogadro's number, and more!
  • Duration

    2-3 Hours
  • Assessment

    Yes
  • Certification

    Yes
  • Publisher

    Khan Academy

Description

Outcome

Certification

View course modules

Description

Molecules are made up of atoms and are the smallest particle in a chemical element or compound. This course will introduce you to the fundamentals of molecules and their composition. You will study molecular formulas, which are essentially the actual number of atoms in a molecule, and empirical formulas which tell you what people have observed. You will also study the mole and Avogadro's number which is equal to 6.023 × 10 to the power of 23.

You will then study molecular formulas and empirical formulas from the mass composition and learn how to balance chemical equations. This course will also discuss stoichiometry which is the study or the calculation of the relationships between the different molecules in a reaction. You will also learn about the limiting reagent which is basically the reactant that produces the least amount of product. You will also study how to solve mass composition problems.

Learning how to convert between atomic mass and grams using Avogadro’s number or the Mole is one of the important topics you will study in this course. Once you have mastered this, you will be able to easily work out ratios and weights of molecules. You will also learn how to balance chemical equations, and get viable chemical reactions by balancing the reactants within equations. So, check out this course and learn more about stoichiometry today!

Start Course Now

Learning Outcomes

Learning Outcomes: - Understand the empirical, molecular and structural formulas; - Use the Periodic Table and the amu to work out weights and ratios; - Convert between Avogadro’s number (moles) and grams; - Derive the empirical structure from mass composition; - Balance an chemical equation.

Certification

All Alison courses are free to enrol, study and complete. To successfully complete this Certificate course and become an Alison Graduate, you need to achieve 80% or higher in each course assessment. Once you have completed this Certificate course, you have the option to acquire official Certification, which is a great way to share your achievement with the world. Your Alison Certification is:

Ideal for sharing with potential employers - include it in your CV, professional social media profiles and job applications
An indication of your commitment to continuously learn, upskill and achieve high results
An incentive for you to continue empowering yourself through lifelong learning

Alison offers 3 types of Certification for completed Certificate courses:

Digital Certificate - a downloadable Certificate in PDF format, immediately available to you when you complete your purchase
Certificate - a physical version of your officially branded and security-marked Certificate, posted to you with FREE shipping
Framed Certificate - a physical version of your officially branded and security-marked Certificate in a stylish frame, posted to you with FREE shipping

All Certification is available to purchase through the Alison Shop. For more information on purchasing Alison Certification, please visit our faqs. If you decide not to purchase your Alison Certification, you can still demonstrate your achievement by sharing your Learner Record or Learner Achievement Verification, both of which are accessible from your Dashboard. For more details on our Certification pricing, please visit our Pricing Page.

Careers

    New course

    This Course has been revised!

    For a more enjoyable learning experience, we recommend that you study the mobile-friendly republished version of this course.

    Take me to revised course.
    Notification

    You have received a new notification

    Click here to view them all