Question

Calculate the moles of ammonia present in a 5.141 g sample of ammonia, which has a molar mass of 17.030 g/mol.?

Answer 1

To calculate the moles of ammonia in a 5.141 g sample, divide the mass by the molar mass of ammonia, resulting in 0.302 moles.

Step-by-step explanation:

To calculate the moles of ammonia present in a 5.141 g sample, we use the following formula:

1. Determine the molar mass of ammonia (NH₃), which is given as 17.030 g/mol.
2. Use the formula: Number of moles (n) = mass (g) / molar mass (g/mol) to find the moles of ammonia.
3. Calculate: n = 5.141 g / 17.030 g/mol = 0.302 moles (rounded to three decimal places).

So, there are 0.302 moles of ammonia in a 5.141 g sample.