Calculating Moles of Ammonia in 1.7 Grams

In this article, we will delve into the calculation of the number of moles present in 1.7 grams of ammonia (NH3). Understanding how to calculate moles is an essential skill in chemistry, and we'll demonstrate step-by-step how to arrive at the correct answer.

Understanding the Molar Mass of Ammonia

Before we begin the calculation, it's important to understand the molar mass of ammonia (NH3). Ammonia consists of one nitrogen atom and three hydrogen atoms. Using the atomic masses of nitrogen (N) and hydrogen (H) from the periodic table, we can calculate the molar mass of ammonia as follows:

Step 1: Calculate the Molar Mass

The relative atomic mass of nitrogen (N) is approximately 14 g/mol, and the relative atomic mass of hydrogen (H) is approximately 1 g/mol. Therefore, the molar mass of ammonia is:

Molar mass of ammonia (NH3) (1 x 14 g/mol) (3 x 1 g/mol) 17 g/mol

Step 2: Calculate the Number of Moles

The number of moles can be calculated using the formula:

No. of moles frac{text{mass of substance}}{text{molar mass of substance}}

Step 3: Plug in the Values

Given the mass of ammonia is 1.7 grams, and the molar mass of ammonia is 17 g/mol, we can now plug these values into the formula:

No. of moles frac{1.70 text{ g}}{17 text{ g/mol}} 0.1 text{ moles}

Conclusion

Hence, the number of moles of ammonia in 1.7 grams is 0.1 moles. It's important to note that when we perform this calculation, the units must be consistent, and the result should have the correct units of moles.

Additional Notes on Moles and Ammonia

Moles are a fundamental concept in chemistry, representing a specific number of particles (such as atoms, molecules, or ions). Understanding how to calculate moles is crucial for a variety of chemical calculations, including determining reaction stoichiometry, calculating empirical formulas, and more.

Frequently Asked Questions

What is the molar mass of ammonia (NH3)? How many moles are present in 1.7 grams of ammonia? What is the significance of moles in chemical calculations?

To better understand these concepts, it's essential to practice similar problems and understand the underlying principles. Additionally, referring to the periodic table and using dimensional analysis will aid in solving such problems accurately.