Understanding the Molar Mass of a Compound

Oct 13, 2025 by magicalceylontours.com 93 views

Understanding the Molar Mass of a Compound

The molar mass of a compound is the sum of the atomic masses of its constituent elements. To calculate the molar mass of $\left(\text{NH}_4\right)_2 \text{SO}_4$ , we need to know the atomic masses of nitrogen (N), hydrogen (H), sulfur (S), and oxygen (O).

Atomic Masses of the Elements

The atomic masses of the elements are:

Nitrogen (N): 14.01 g/mol
Hydrogen (H): 1.01 g/mol
Sulfur (S): 32.07 g/mol
Oxygen (O): 16.00 g/mol

Calculating the Molar Mass of $\left(\text{NH}_4\right)_2 \text{SO}_4$

To calculate the molar mass of $\left(\text{NH}_4\right)_2 \text{SO}_4$ , we need to count the number of atoms of each element in the compound and multiply it by the atomic mass of each element.

The compound $\left(\text{NH}_4\right)_2 \text{SO}_4$ consists of:

2 nitrogen atoms
8 hydrogen atoms
1 sulfur atom
4 oxygen atoms

Calculating the Molar Mass

Now, we can calculate the molar mass of $\left(\text{NH}_4\right)_2 \text{SO}_4$ by multiplying the number of atoms of each element by its atomic mass and adding them together:

Molar mass of $\left(\text{NH}_4\right)_2 \text{SO}_4$ = (2 x 14.01) + (8 x 1.01) + (1 x 32.07) + (4 x 16.00)

Performing the Calculation

Now, let's perform the calculation:

Molar mass of $\left(\text{NH}_4\right)_2 \text{SO}_4$ = (28.02) + (8.08) + (32.07) + (64.00)

Adding the Values

Now, let's add the values:

Molar mass of $\left(\text{NH}_4\right)_2 \text{SO}_4$ = 132.17 g/mol

Conclusion

The molar mass of $\left(\text{NH}_4\right)_2 \text{SO}_4$ is 132.17 g/mol.

Comparison with the Options

Now, let's compare the calculated molar mass with the options:

A. 63.09 g B. 84.17 g C. 114.12 g D. 118.16 g E. 132.17 g

The correct answer is E. 132.17 g.

Importance of Molar Mass

The molar mass of a compound is an important concept in chemistry. It is used to calculate the number of moles of a substance and to determine the amount of substance required for a reaction.

Applications of Molar Mass

The molar mass of a compound has many applications in chemistry, including:

Calculating the number of moles of a substance
Determining the amount of substance required for a reaction
Understanding the properties of a substance
Predicting the behavior of a substance in a reaction

Conclusion

In conclusion, the molar mass of $\left(\text{NH}_4\right)_2 \text{SO}_4$ is 132.17 g/mol. This concept is important in chemistry and has many applications in understanding the properties and behavior of substances.

Frequently Asked Questions

Q: What is the molar mass of $\left(\text{NH}_4\right)_2 \text{SO}_4$ ?

A: The molar mass of $\left(\text{NH}_4\right)_2 \text{SO}_4$ is 132.17 g/mol.

Q: How is the molar mass of a compound calculated?

A: The molar mass of a compound is calculated by multiplying the number of atoms of each element by its atomic mass and adding them together.

Q: What is the importance of molar mass in chemistry?

A: The molar mass of a compound is an important concept in chemistry. It is used to calculate the number of moles of a substance and to determine the amount of substance required for a reaction.

Q: What are the applications of molar mass in chemistry?

A: The molar mass of a compound has many applications in chemistry, including calculating the number of moles of a substance, determining the amount of substance required for a reaction, understanding the properties of a substance, and predicting the behavior of a substance in a reaction.

Understanding the Molar Mass of a Compound

Q&A: Molar Mass of $\left(\text{NH}_4\right)_2 \text{SO}_4$

Q: What is the molar mass of $\left(\text{NH}_4\right)_2 \text{SO}_4$ ?

A: The molar mass of $\left(\text{NH}_4\right)_2 \text{SO}_4$ is 132.17 g/mol.

Q: How is the molar mass of a compound calculated?

A: The molar mass of a compound is calculated by multiplying the number of atoms of each element by its atomic mass and adding them together.

Q: What is the importance of molar mass in chemistry?

A: The molar mass of a compound is an important concept in chemistry. It is used to calculate the number of moles of a substance and to determine the amount of substance required for a reaction.

Q: What are the applications of molar mass in chemistry?

Q: How do I calculate the molar mass of a compound with multiple elements?

A: To calculate the molar mass of a compound with multiple elements, you need to count the number of atoms of each element in the compound and multiply it by the atomic mass of each element. Then, add the values together to get the molar mass of the compound.

Q: What is the difference between atomic mass and molar mass?

A: Atomic mass is the mass of a single atom of an element, while molar mass is the mass of one mole of a substance. One mole of a substance contains 6.022 x 10^23 particles (atoms or molecules).

Q: How do I determine the number of moles of a substance?

A: To determine the number of moles of a substance, you need to know the molar mass of the substance and the mass of the substance. You can use the formula: moles = mass / molar mass.

Q: What is the significance of molar mass in chemical reactions?

A: Molar mass is significant in chemical reactions because it helps to determine the amount of substance required for a reaction. It also helps to predict the behavior of a substance in a reaction.

Q: Can I use molar mass to predict the properties of a substance?

A: Yes, molar mass can be used to predict the properties of a substance. For example, substances with high molar masses tend to be less reactive than substances with low molar masses.

Q: How do I calculate the molar mass of a compound with multiple isotopes?

A: To calculate the molar mass of a compound with multiple isotopes, you need to know the atomic masses of the isotopes and the number of atoms of each isotope in the compound. Then, add the values together to get the molar mass of the compound.

Conclusion

Frequently Asked Questions

Q: What is the molar mass of $\left(\text{NH}_4\right)_2 \text{SO}_4$ ?

A: The molar mass of $\left(\text{NH}_4\right)_2 \text{SO}_4$ is 132.17 g/mol.

Q: How is the molar mass of a compound calculated?

A: The molar mass of a compound is calculated by multiplying the number of atoms of each element by its atomic mass and adding them together.

Q: What is the importance of molar mass in chemistry?

A: The molar mass of a compound is an important concept in chemistry. It is used to calculate the number of moles of a substance and to determine the amount of substance required for a reaction.