Calculating the Mass of NaCl

Oct 13, 2025 by miodeya.com 30 views

Understanding the Problem

To find the mass of 1.84 mol NaCl, we need to use the concept of molar mass. The molar mass of a substance is the mass of one mole of that substance. In this case, the molar mass of NaCl is given as 58.44 g/mol. We can use this value to calculate the mass of 1.84 mol NaCl.

Calculating the Mass of NaCl

The formula to calculate the mass of a substance is:

mass = number of moles x molar mass

In this case, the number of moles is 1.84 mol and the molar mass is 58.44 g/mol. Plugging in these values, we get:

mass = 1.84 mol x 58.44 g/mol

Performing the Calculation

To perform the calculation, we multiply the number of moles by the molar mass:

mass = 1.84 x 58.44 mass = 107.3 g

Determining the Correct Number of Significant Figures

The number of significant figures in the answer depends on the number of significant figures in the given values. The molar mass of NaCl has 4 significant figures, and the number of moles has 4 significant figures. Therefore, the answer should have 4 significant figures.

Conclusion

The mass of 1.84 mol NaCl is 107.3 g. This value has 4 significant figures, which is the correct number of significant figures based on the given values.

Additional Information

The molar mass of NaCl is 58.44 g/mol.
The number of moles of NaCl is 1.84 mol.
The mass of NaCl can be calculated using the formula: mass = number of moles x molar mass.
The correct number of significant figures in the answer depends on the number of significant figures in the given values.

Final Answer

The final answer is: $\boxed{107.3}$

Frequently Asked Questions

Q: What is the molar mass of NaCl?

A: The molar mass of NaCl is 58.44 g/mol.

Q: How do I calculate the mass of NaCl?

A: To calculate the mass of NaCl, you need to multiply the number of moles by the molar mass. The formula is: mass = number of moles x molar mass.

Q: What is the mass of 1.84 mol NaCl?

A: The mass of 1.84 mol NaCl is 107.3 g.

Q: How many significant figures should I have in my answer?

A: The number of significant figures in your answer depends on the number of significant figures in the given values. In this case, the molar mass of NaCl has 4 significant figures, and the number of moles has 4 significant figures. Therefore, the answer should have 4 significant figures.

Q: What if I have a different number of moles of NaCl?

A: If you have a different number of moles of NaCl, you can simply multiply the new number of moles by the molar mass to get the new mass.

Q: Can I use this formula for other substances?

A: Yes, you can use this formula to calculate the mass of other substances as long as you know the molar mass and the number of moles.

Q: What if I don't know the molar mass of a substance?

A: If you don't know the molar mass of a substance, you can look it up in a reference book or online. Alternatively, you can calculate the molar mass using the atomic masses of the elements that make up the substance.

Q: How do I determine the correct number of significant figures in my answer?

A: To determine the correct number of significant figures in your answer, you need to look at the number of significant figures in the given values. The answer should have the same number of significant figures as the given values.

Q: Can I use a calculator to calculate the mass of NaCl?

A: Yes, you can use a calculator to calculate the mass of NaCl. Simply enter the number of moles and the molar mass into the calculator and multiply them together.

Common Mistakes

Forgetting to multiply the number of moles by the molar mass
Not using the correct number of significant figures in the answer
Not looking up the molar mass of a substance if it is not known
Not using a calculator to simplify the calculation

Tips and Tricks

Make sure to use the correct units for the number of moles and the molar mass
Use a calculator to simplify the calculation
Check your answer to make sure it has the correct number of significant figures
Look up the molar mass of a substance if it is not known

Conclusion

Calculating the mass of NaCl is a simple process that involves multiplying the number of moles by the molar mass. By following the formula and using the correct number of significant figures, you can easily calculate the mass of NaCl. Remember to check your answer and use a calculator to simplify the calculation.