How Many Moles Are In 623 Grams Of $H_2SO_4$? (Round Your Numbers Only)Type Your Answer:

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Understanding the Problem

To solve this problem, we need to calculate the number of moles of sulfuric acid (H2SO4) present in 623 grams of the substance. This requires us to use the concept of molar mass and the formula for calculating moles.

Molar Mass of Sulfuric Acid

The molar mass of sulfuric acid (H2SO4) is the sum of the atomic masses of its constituent elements: hydrogen (H), sulfur (S), and oxygen (O). The atomic masses of these elements are approximately:

  • Hydrogen (H): 1.008 g/mol
  • Sulfur (S): 32.065 g/mol
  • Oxygen (O): 16.00 g/mol

Calculating Molar Mass of Sulfuric Acid

To calculate the molar mass of sulfuric acid, we need to multiply the atomic masses of its constituent elements by their respective numbers and add them together.

Molar mass of H2SO4 = (2 x 1.008 g/mol) + 32.065 g/mol + (4 x 16.00 g/mol) Molar mass of H2SO4 = 2.016 g/mol + 32.065 g/mol + 64.00 g/mol Molar mass of H2SO4 = 98.081 g/mol

Calculating Moles of Sulfuric Acid

Now that we have the molar mass of sulfuric acid, we can use the formula to calculate the number of moles:

moles = mass of substance / molar mass

Given that we have 623 grams of sulfuric acid, we can plug in the values:

moles = 623 g / 98.081 g/mol

Performing the Calculation

To calculate the number of moles, we need to divide the mass of sulfuric acid (623 g) by its molar mass (98.081 g/mol).

moles = 623 g / 98.081 g/mol moles ≈ 6.35 mol

Rounding the Answer

As per the problem statement, we need to round our answer to the nearest whole number. Therefore, the number of moles of sulfuric acid present in 623 grams of the substance is approximately 6.35 mol, which rounds to 6 mol.

Conclusion

In this article, we have demonstrated how to calculate the number of moles of sulfuric acid (H2SO4) present in a given mass of the substance. By using the concept of molar mass and the formula for calculating moles, we have arrived at the answer of approximately 6 mol. This calculation is essential in various chemical reactions and processes where the amount of sulfuric acid is a critical factor.

Key Takeaways

  • The molar mass of sulfuric acid (H2SO4) is approximately 98.081 g/mol.
  • To calculate the number of moles of sulfuric acid, we need to divide the mass of the substance by its molar mass.
  • The number of moles of sulfuric acid present in 623 grams of the substance is approximately 6 mol.

Q: What is the molar mass of sulfuric acid (H2SO4)?

A: The molar mass of sulfuric acid (H2SO4) is approximately 98.081 g/mol. This value is calculated by adding the atomic masses of its constituent elements: hydrogen (H), sulfur (S), and oxygen (O).

Q: How do I calculate the number of moles of sulfuric acid?

A: To calculate the number of moles of sulfuric acid, you need to divide the mass of the substance by its molar mass. The formula is:

moles = mass of substance / molar mass

Q: What is the significance of rounding the answer to the nearest whole number?

A: Rounding the answer to the nearest whole number is a common practice in chemistry to simplify the results and make them easier to understand. However, it's essential to note that the actual value may be slightly different.

Q: Can I use this method to calculate the number of moles of other substances?

A: Yes, this method can be applied to calculate the number of moles of any substance, as long as you know its molar mass. Simply replace the molar mass of sulfuric acid with the molar mass of the substance you're interested in.

Q: What are some common applications of calculating moles in chemistry?

A: Calculating moles is a fundamental concept in chemistry, and it has numerous applications in various fields, including:

  • Chemical reactions: Moles are used to calculate the amount of reactants and products in a chemical reaction.
  • Stoichiometry: Moles are used to determine the amount of substance required for a chemical reaction.
  • Chemical analysis: Moles are used to calculate the concentration of a substance in a solution.

Q: How do I ensure accuracy when calculating moles?

A: To ensure accuracy when calculating moles, make sure to:

  • Use the correct molar mass of the substance.
  • Use the correct mass of the substance.
  • Perform the calculation carefully and accurately.
  • Round the answer to the nearest whole number, if necessary.

Q: Can I use a calculator to calculate moles?

A: Yes, you can use a calculator to calculate moles. Simply enter the mass of the substance and its molar mass, and the calculator will give you the number of moles.

Q: What are some common mistakes to avoid when calculating moles?

A: Some common mistakes to avoid when calculating moles include:

  • Using the wrong molar mass of the substance.
  • Using the wrong mass of the substance.
  • Performing the calculation incorrectly.
  • Failing to round the answer to the nearest whole number, if necessary.

Conclusion

Calculating moles is a fundamental concept in chemistry, and it has numerous applications in various fields. By understanding the molar mass of a substance and using the correct formula, you can calculate the number of moles with accuracy. Remember to round the answer to the nearest whole number, if necessary, and avoid common mistakes to ensure accuracy.