How To Calculate The Molar Mass of a Compound - Quick & Easy!

The Organic Chemistry Tutor
8 Aug 201711:19
EducationalLearning
32 Likes 10 Comments

TLDRThis educational video script offers a comprehensive guide on calculating the molar mass of various compounds and elements. It begins with the basics, explaining the molar mass of elemental nitrogen and fluorine, and progresses to more complex molecules like ozone and sulfur. The script then illustrates the process for calculating the molar mass of carbon dioxide and silicon tetrafluoride, followed by glucose and calcium phosphate. It concludes with a step-by-step approach to determining the molar mass of vanadium hydrogen phosphate, emphasizing the importance of writing the correct chemical formula first. The script is an excellent resource for understanding the relationship between mass, moles, and the periodic table.

Takeaways
  • 🔍 The script explains how to find the molar mass of various compounds, starting with the basics of elemental nitrogen.
  • 📊 The molar mass of an element is the mass of one mole of its atoms, which can be found on the periodic table.
  • 🌐 For elemental nitrogen, the molar mass is 14.01 grams per mole, meaning one mole of nitrogen atoms weighs 14.01 grams.
  • 🍂 The script uses the example of ozone (O3) to demonstrate calculating the molar mass of a molecule, which is 48 grams per mole.
  • 🍬 It also explains how to find the molar mass of elemental sulfur (S8), which is 256.56 grams per mole.
  • 🌿 The process involves multiplying the atomic mass of each element by the number of atoms present in the compound.
  • 🌿 For carbon dioxide (CO2), the molar mass is calculated as 44.1 grams per mole by adding the atomic masses of carbon and oxygen.
  • 🌟 The script challenges viewers to calculate the molar mass of silicon tetrafluoride (SiF4), resulting in 104.09 grams per mole.
  • 🍬 Glucose (C6H12O6) is used as an example to show how to calculate the molar mass of a more complex organic molecule, yielding 180.16 grams per mole.
  • 🧪 The script covers how to find the molar mass of ionic compounds like calcium phosphate (Ca3(PO4)2), which is 310.18 grams per mole.
  • 💊 The final example involves calculating the molar mass of vanadium(V) hydrogen phosphate, resulting in 581.77 grams per mole.
Q & A

  • What is the molar mass of elemental nitrogen as an atom?

    -The molar mass of elemental nitrogen as an atom is 14.01 g/mol.

  • How do you find the molar mass of atomic fluorine?

    -The molar mass of atomic fluorine is 19 g/mol.

  • What is the molar mass of ozone (O3)?

    -The molar mass of ozone (O3) is 48 g/mol.

  • How do you calculate the molar mass of elemental sulfur (S8)?

    -To calculate the molar mass of elemental sulfur (S8), multiply the atomic mass of sulfur (32.7 g/mol) by 8, which gives 256.56 g/mol.

  • What is the molar mass of carbon dioxide (CO2)?

    -The molar mass of carbon dioxide (CO2) is 44.1 g/mol.

  • How is the molar mass of silicon tetrafluoride (SiF4) determined?

    -The molar mass of silicon tetrafluoride (SiF4) is determined by adding the molar masses of one silicon atom (28.9 g/mol) and four fluorine atoms (19 g/mol each), resulting in 104.9 g/mol.

  • What is the molar mass of glucose (C6H12O6)?

    -The molar mass of glucose (C6H12O6) is 180.56 g/mol.

  • How do you find the molar mass of calcium phosphate (Ca3(PO4)2)?

    -To find the molar mass of calcium phosphate (Ca3(PO4)2), add the molar masses of three calcium atoms (40.8 g/mol each), two phosphorus atoms (30.97 g/mol each), and eight oxygen atoms (16 g/mol each), resulting in 310.18 g/mol.

  • What is the chemical formula for vanadium(V) hydrogen phosphate?

    -The chemical formula for vanadium(V) hydrogen phosphate is V2(HPO4)5.

  • How do you calculate the molar mass of vanadium(V) hydrogen phosphate (V2(HPO4)5)?

    -To calculate the molar mass of vanadium(V) hydrogen phosphate (V2(HPO4)5), add the molar masses of two vanadium atoms (50.94 g/mol each), five hydrogen atoms (1.08 g/mol each), five phosphorus atoms (30.97 g/mol each), and twenty oxygen atoms (16 g/mol each), resulting in 581.77 g/mol.

Outlines
00:00
🧪 Understanding Molar Mass of Elements and Compounds

This paragraph introduces the concept of molar mass, starting with elemental nitrogen and fluorine. It explains how to find the molar mass by using the atomic mass from the periodic table, which is measured in grams per mole (g/mol). For nitrogen, the molar mass is 14.01 g/mol, and for fluorine, it's 19 g/mol. The paragraph then moves on to molecules like ozone (O3) and elemental sulfur (S8), demonstrating how to calculate their molar masses by multiplying the atomic mass of the constituent atoms. Ozone has a molar mass of 48 g/mol, and sulfur, with eight atoms, has a molar mass of 256.56 g/mol. The paragraph encourages viewers to try calculating the molar mass of carbon dioxide (CO2) and silicon tetrafluoride (SiF4), providing the atomic masses needed for the calculations.

05:01
📚 Calculating Molar Mass of Complex Compounds and Ions

The second paragraph delves into calculating the molar mass of more complex compounds, such as glucose (C6H12O6), and ionic compounds like calcium phosphate (Ca3(PO4)2). It explains the process of breaking down the chemical formula into its constituent elements and multiplying their atomic masses accordingly. For glucose, the calculation involves adding the atomic masses of six carbon atoms, twelve hydrogen atoms, and six oxygen atoms, resulting in a molar mass of 180.56 g/mol. For calcium phosphate, the process involves understanding the charges of the ions and their respective atomic masses, leading to a molar mass of 310.18 g/mol. The paragraph also introduces the concept of polyatomic ions and how to write the chemical formula for ionic compounds before calculating their molar mass.

10:02
🧬 Advanced Molar Mass Calculations with Polyatomic Ions

The final paragraph focuses on advanced molar mass calculations, specifically for vanadium pentoxide hydrogen phosphate (V2H5P4O20). It explains the importance of understanding the charges of metals and polyatomic ions, and how to write the correct chemical formula before calculating the molar mass. The paragraph provides the atomic masses for vanadium, hydrogen, phosphorus, and oxygen, and guides through the calculation by multiplying these by the number of atoms of each element in the compound. The resulting molar mass for vanadium pentoxide hydrogen phosphate is 581.77 g/mol, demonstrating the process of combining atomic masses to find the molar mass of complex compounds.

Mindmap
Keywords
💡Molar Mass
Molar mass is the mass of one mole of a substance, typically measured in grams per mole (g/mol). It is a crucial concept in chemistry, as it connects the mass of a substance with the number of moles. In the video, molar mass is used to calculate the mass of various compounds, such as nitrogen, fluorine, ozone, sulfur, and glucose, by multiplying the atomic mass of each element in the compound by the number of atoms of that element present.
💡Elemental Nitrogen
Elemental nitrogen refers to nitrogen in its pure, elemental form, as opposed to nitrogen as a diatomic molecule (N2). The script clarifies that the molar mass of elemental nitrogen is 14.01 g/mol, which is derived from its atomic mass found on the periodic table. This concept is essential for understanding how to calculate the molar mass of compounds that include nitrogen atoms.
💡Atomic Mass
Atomic mass is the mass of an individual atom of an element, usually given in atomic mass units (amu). It is a key component in determining molar mass, as it represents the mass of a single atom before combining to form molecules or compounds. The video script uses atomic masses of elements like oxygen, sulfur, and carbon to calculate the molar masses of ozone (O3), sulfur (S8), and carbon dioxide (CO2).
💡Ozone (O3)
Ozone is a molecule composed of three oxygen atoms (O3) and is found in the Earth's upper atmosphere. The video script uses the concept of ozone to illustrate how to calculate the molar mass of a molecule with more than one atom of the same element. The molar mass of ozone is calculated by multiplying the atomic mass of oxygen (16 g/mol) by three, resulting in 48 g/mol.
💡Silicon Tetrafluoride
Silicon tetrafluoride is a chemical compound with the formula SiF4. The video script uses this compound as an example to demonstrate the calculation of molar mass for a compound with multiple types of atoms. The molar mass is found by adding the atomic masses of one silicon atom (28.9 g/mol) and four fluorine atoms (19 g/mol each), totaling 108.97 g/mol.
💡Glucose
Glucose is a monosaccharide, a simple sugar that serves as a primary source of energy for cells. In the script, glucose is used as an example to show how to calculate the molar mass of a more complex organic molecule. The molar mass of glucose (C6H12O6) is calculated by summing the atomic masses of six carbon atoms, twelve hydrogen atoms, and six oxygen atoms, resulting in 180.16 g/mol.
💡Calcium Phosphate
Calcium phosphate is an ionic compound composed of calcium (Ca) and phosphate (PO4) ions. The video script explains how to write the chemical formula for calcium phosphate (Ca3(PO4)2) and then calculate its molar mass by adding the atomic masses of three calcium atoms, two phosphorus atoms, and eight oxygen atoms, yielding 310.18 g/mol.
💡Vanadium
Vanadium is a chemical element with the symbol V and an atomic number of 23. In the script, vanadium is used in the context of vanadium pentoxide (V2O5) and vanadium hydrogen phosphate, where it carries a positive five charge. The atomic mass of vanadium is used to calculate the molar mass of vanadium hydrogen phosphate, which is an example of an ionic compound.
💡Polyatomic Ions
Polyatomic ions are groups of atoms that are covalently bonded and carry a charge. In the video, phosphate (PO4^3-) and hydrogen phosphate (HPO4^2-) are examples of polyatomic ions. These ions are crucial in writing the correct chemical formulas for compounds like calcium phosphate and vanadium hydrogen phosphate, which are then used to calculate molar masses.
💡Chemical Formula
A chemical formula represents the elemental composition of a compound, indicating the types and numbers of atoms present. In the video, writing the correct chemical formula is a prerequisite for calculating molar mass. The script demonstrates how to write chemical formulas for compounds like calcium phosphate and vanadium hydrogen phosphate before proceeding with molar mass calculations.
Highlights

Introduction to finding the molar mass of a compound.

Explanation of molar mass and its relation to elemental nitrogen.

Molar mass of nitrogen as an atom is 14.01 G per mole.

Molar mass of fluorine is 19 G per mole.

Calculating the molar mass of ozone (O3) with three oxygen atoms.

Molar mass of ozone is 48 G per mole.

Finding the molar mass of elemental sulfur (S8).

Molar mass of sulfur is 256.56 G per mole.

Calculating the molar mass of carbon dioxide (CO2).

Molar mass of carbon dioxide is 44.1 G per mole.

Determining the molar mass of silicon tetrafluoride.

Molar mass of silicon tetrafluoride is 104.09 G per mole.

Calculating the molar mass of glucose (C6H12O6).

Molar mass of glucose is 180.56 G per mole.

Finding the molar mass of calcium phosphate without a given formula.

Molar mass of calcium phosphate is 310.18 G per mole.

Writing the chemical formula for vanadium hydrogen phosphate.

Molar mass of vanadium hydrogen phosphate is 581.77 G per mole.

Transcripts

Browse More Related Video

How To Convert Grams To Moles - VERY EASY!

Mole Conversions Made Easy: How to Convert Between Grams and Moles

Step by Step Stoichiometry Practice Problems | How to Pass Chemistry

Introduction to Combustion Analysis, Empirical Formula & Molecular Formula Problems

Converting Grams to Moles Using Molar Mass | How to Pass Chemistry

Converting Between Grams and Moles (Part 2)

Rate This

5.0 / 5 (0 votes)

Thanks for rating:

Related Tags
Molar MassChemistryEducationalPeriodic TableElemental MassCompound FormulaOzoneSulfurCarbon DioxideSilicon TetrafluorideGlucoseCalcium PhosphateVadium Hydrogen Phosphate