Select The Correct Answer.The Atomic Mass Of Carbon Is 12.01, Sodium Is 22.99, And Oxygen Is 16.00. What Is The Molar Mass Of Sodium Oxalate { \left( \text{Na}_2 \text{C}_2 \text{O}_4 \right)$}$?A. ${ 134.00 \, \text{g}\$} B.

by ADMIN 226 views

Understanding Molar Mass

Molar mass is a fundamental concept in chemistry that represents the mass of one mole of a substance. It is calculated by adding the atomic masses of all the atoms present in the molecule. In this article, we will focus on calculating the molar mass of sodium oxalate, a compound composed of sodium, carbon, and oxygen atoms.

Atomic Mass of Elements

Before we dive into the calculation, let's recall the atomic masses of the elements involved:

  • Carbon (C): 12.01 g/mol
  • Sodium (Na): 22.99 g/mol
  • Oxygen (O): 16.00 g/mol

Molecular Formula of Sodium Oxalate

The molecular formula of sodium oxalate is [$\left( \text{Na}_2 \text{C}_2 \text{O}_4 \right)$]. This means that one molecule of sodium oxalate contains two sodium atoms, two carbon atoms, and four oxygen atoms.

Calculating Molar Mass

To calculate the molar mass of sodium oxalate, we need to add the atomic masses of all the atoms present in the molecule. We will use the atomic masses of carbon, sodium, and oxygen to calculate the molar mass.

  • Sodium (Na): 2 atoms * 22.99 g/mol = 45.98 g/mol
  • Carbon (C): 2 atoms * 12.01 g/mol = 24.02 g/mol
  • Oxygen (O): 4 atoms * 16.00 g/mol = 64.00 g/mol

Adding Atomic Masses

Now, let's add the atomic masses of sodium, carbon, and oxygen to calculate the molar mass of sodium oxalate:

45.98 g/mol (sodium) + 24.02 g/mol (carbon) + 64.00 g/mol (oxygen) = 134.00 g/mol

Conclusion

The molar mass of sodium oxalate is 134.00 g/mol. This is the correct answer to the problem.

Why is Molar Mass Important?

Molar mass is an essential concept in chemistry that has numerous applications in various fields, including:

  • Chemical reactions: Molar mass is used to calculate the number of moles of a substance required for a chemical reaction.
  • Chemical equations: Molar mass is used to balance chemical equations and determine the number of moles of each substance involved.
  • Chemical properties: Molar mass is used to predict the chemical properties of a substance, such as its boiling point, melting point, and solubility.

Real-World Applications of Molar Mass

Molar mass has numerous real-world applications, including:

  • Pharmaceutical industry: Molar mass is used to calculate the number of moles of a substance required for the production of pharmaceuticals.
  • Food industry: Molar mass is used to calculate the number of moles of a substance required for the production of food products.
  • Environmental science: Molar mass is used to calculate the number of moles of a substance required for the treatment of environmental pollutants.

Conclusion

In conclusion, molar mass is a fundamental concept in chemistry that has numerous applications in various fields. Calculating the molar mass of a substance requires adding the atomic masses of all the atoms present in the molecule. In this article, we calculated the molar mass of sodium oxalate and discussed its importance in various fields.

Q: What is molar mass?

A: Molar mass is the mass of one mole of a substance, expressed in units of grams per mole (g/mol). It is calculated by adding the atomic masses of all the atoms present in the molecule.

Q: Why is molar mass important?

A: Molar mass is an essential concept in chemistry that has numerous applications in various fields, including chemical reactions, chemical equations, and chemical properties. It is used to calculate the number of moles of a substance required for a chemical reaction, balance chemical equations, and predict the chemical properties of a substance.

Q: How is molar mass calculated?

A: Molar mass is calculated by adding the atomic masses of all the atoms present in the molecule. The atomic masses of the elements involved are multiplied by the number of atoms present in the molecule, and then added together.

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. Atomic mass is typically expressed in units of atomic mass units (amu), while molar mass is expressed in units of grams per mole (g/mol).

Q: How is molar mass used in real-world applications?

A: Molar mass is used in various real-world applications, including the pharmaceutical industry, food industry, and environmental science. It is used to calculate the number of moles of a substance required for the production of pharmaceuticals, food products, and the treatment of environmental pollutants.

Q: Can molar mass be used to predict the chemical properties of a substance?

A: Yes, molar mass can be used to predict the chemical properties of a substance. The molar mass of a substance is related to its boiling point, melting point, and solubility. Substances with high molar masses tend to have higher boiling points and melting points, while substances with low molar masses tend to have lower boiling points and melting points.

Q: How is molar mass used in chemical reactions?

A: Molar mass is used to calculate the number of moles of a substance required for a chemical reaction. The molar mass of the reactants and products is used to balance the chemical equation and determine the number of moles of each substance involved.

Q: Can molar mass be used to determine the number of moles of a substance?

A: Yes, molar mass can be used to determine the number of moles of a substance. The molar mass of a substance is used to calculate the number of moles of the substance present in a given mass.

Q: What is the relationship between molar mass and the number of moles of a substance?

A: The molar mass of a substance is directly proportional to the number of moles of the substance. The more moles of a substance present, the higher the molar mass of the substance.

Q: Can molar mass be used to predict the solubility of a substance?

A: Yes, molar mass can be used to predict the solubility of a substance. Substances with high molar masses tend to have lower solubility, while substances with low molar masses tend to have higher solubility.

Q: How is molar mass used in environmental science?

A: Molar mass is used in environmental science to calculate the number of moles of a substance required for the treatment of environmental pollutants. The molar mass of the pollutant and the treatment agent is used to determine the number of moles of each substance involved.

Q: Can molar mass be used to predict the boiling point of a substance?

A: Yes, molar mass can be used to predict the boiling point of a substance. Substances with high molar masses tend to have higher boiling points, while substances with low molar masses tend to have lower boiling points.

Q: How is molar mass used in the pharmaceutical industry?

A: Molar mass is used in the pharmaceutical industry to calculate the number of moles of a substance required for the production of pharmaceuticals. The molar mass of the active ingredient and the excipients is used to determine the number of moles of each substance involved.

Q: Can molar mass be used to predict the melting point of a substance?

A: Yes, molar mass can be used to predict the melting point of a substance. Substances with high molar masses tend to have higher melting points, while substances with low molar masses tend to have lower melting points.