Determine The Mass Of 4.20 Moles Of $C_6H_{12}$.

Introduction

In chemistry, determining the mass of a molecule is a crucial task that helps us understand the properties and behavior of substances. In this article, we will learn how to calculate the mass of a molecule using the formula: mass = moles x molar mass. We will use the example of 4.20 moles of $C_6H_{12}$ to illustrate the process.

Understanding Molar Mass

Molar mass is the mass of one mole of a substance. It is calculated by adding the atomic masses of all the atoms in the molecule. The atomic masses of carbon (C) and hydrogen (H) are 12.01 g/mol and 1.008 g/mol, respectively.

Calculating the Molar Mass of $C_6H_{12}$

To calculate the molar mass of $C_6H_{12}$, we need to add the atomic masses of 6 carbon atoms and 12 hydrogen atoms.

Molar mass of $C_6H_{12}$ = (6 x 12.01 g/mol) + (12 x 1.008 g/mol) Molar mass of $C_6H_{12}$ = 72.06 g/mol + 12.096 g/mol Molar mass of $C_6H_{12}$ = 84.156 g/mol

Calculating the Mass of 4.20 Moles of $C_6H_{12}$

Now that we have the molar mass of $C_6H_{12}$, we can calculate the mass of 4.20 moles of the substance using the formula: mass = moles x molar mass.

Mass of 4.20 moles of $C_6H_{12}$ = 4.20 moles x 84.156 g/mol Mass of 4.20 moles of $C_6H_{12}$ = 353.15 g

Conclusion

In this article, we learned how to calculate the mass of a molecule using the formula: mass = moles x molar mass. We used the example of 4.20 moles of $C_6H_{12}$ to illustrate the process. By following these steps, you can calculate the mass of any molecule using its molar mass and the number of moles.

Calculating Molar Mass: A Step-by-Step Guide

Step 1: Identify the Atomic Masses of the Atoms in the Molecule

The atomic masses of carbon (C) and hydrogen (H) are 12.01 g/mol and 1.008 g/mol, respectively.

Step 2: Add the Atomic Masses of All the Atoms in the Molecule

To calculate the molar mass of $C_6H_{12}$, we need to add the atomic masses of 6 carbon atoms and 12 hydrogen atoms.

Molar mass of $C_6H_{12}$ = (6 x 12.01 g/mol) + (12 x 1.008 g/mol) Molar mass of $C_6H_{12}$ = 72.06 g/mol + 12.096 g/mol Molar mass of $C_6H_{12}$ = 84.156 g/mol

Step 3: Calculate the Mass of the Molecule Using the Formula: Mass = Moles x Molar Mass

Now that we have the molar mass of $C_6H_{12}$, we can calculate the mass of 4.20 moles of the substance using the formula: mass = moles x molar mass.

Mass of 4.20 moles of $C_6H_{12}$ = 4.20 moles x 84.156 g/mol Mass of 4.20 moles of $C_6H_{12}$ = 353.15 g

Step 4: Verify the Calculation

To verify the calculation, we can check the units of the answer. The units of the answer should be grams (g).

Common Mistakes to Avoid

When calculating the mass of a molecule, there are several common mistakes to avoid:

• Incorrect atomic masses: Make sure to use the correct atomic masses of the atoms in the molecule.
• Incorrect number of moles: Make sure to use the correct number of moles of the substance.
• Incorrect molar mass: Make sure to calculate the molar mass of the molecule correctly.
• Incorrect units: Make sure to use the correct units of measurement, such as grams (g).

Conclusion

Q: What is the molar mass of a molecule?

A: The molar mass of a molecule is the mass of one mole of the substance. It is calculated by adding the atomic masses of all the atoms in the molecule.

Q: How do I calculate the molar mass of a molecule?

A: To calculate the molar mass of a molecule, you need to add the atomic masses of all the atoms in the molecule. For example, to calculate the molar mass of $C_6H_{12}$, you would add the atomic masses of 6 carbon atoms and 12 hydrogen atoms.

Q: What is the formula for calculating the mass of a molecule?

A: The formula for calculating the mass of a molecule is: mass = moles x molar mass.

Q: How do I calculate the mass of a molecule using the formula: mass = moles x molar mass?

A: To calculate the mass of a molecule using the formula: mass = moles x molar mass, you need to multiply the number of moles of the substance by the molar mass of the molecule. For example, to calculate the mass of 4.20 moles of $C_6H_{12}$, you would multiply 4.20 moles by the molar mass of $C_6H_{12}$.

Q: What are some common mistakes to avoid when calculating the mass of a molecule?

A: Some common mistakes to avoid when calculating the mass of a molecule include:

• Incorrect atomic masses: Make sure to use the correct atomic masses of the atoms in the molecule.
• Incorrect number of moles: Make sure to use the correct number of moles of the substance.
• Incorrect molar mass: Make sure to calculate the molar mass of the molecule correctly.
• Incorrect units: Make sure to use the correct units of measurement, such as grams (g).

Q: How do I verify my calculation?

A: To verify your calculation, you can check the units of the answer. The units of the answer should be grams (g).

Q: What is the significance of calculating the mass of a molecule?

A: Calculating the mass of a molecule is important in chemistry because it helps us understand the properties and behavior of substances. By knowing the mass of a molecule, we can predict its behavior in different situations and make informed decisions about its use.

Q: Can I calculate the mass of any molecule using the formula: mass = moles x molar mass?

A: Yes, you can calculate the mass of any molecule using the formula: mass = moles x molar mass. However, you need to make sure to use the correct atomic masses of the atoms in the molecule and the correct number of moles of the substance.

Q: How do I calculate the molar mass of a molecule with multiple atoms of the same element?

A: To calculate the molar mass of a molecule with multiple atoms of the same element, you need to multiply the atomic mass of the element by the number of atoms of that element in the molecule. For example, to calculate the molar mass of $C_6H_{12}$, you would multiply the atomic mass of carbon by 6 and the atomic mass of hydrogen by 12.

Q: Can I use the formula: mass = moles x molar mass to calculate the mass of a mixture of substances?

A: No, you cannot use the formula: mass = moles x molar mass to calculate the mass of a mixture of substances. This formula is only applicable to pure substances. To calculate the mass of a mixture of substances, you need to use a different formula that takes into account the proportions of each substance in the mixture.