Question

Lakshmi has a sample of ammonium nitrate (NH4NO3) that has a mass of 40.10 g. She knows that the molar mass of NH4NO3 is 80.0432 g/mol. To the correct number of significant digits, how many moles of NH4NO3 does the sample contain?

Answer 1

The sample contains 0.501 moles of NH4NO3.

Step-by-step explanation:

The mass of the sample of ammonium nitrate is given as 40.10 g and the molar mass of NH4NO3 is 80.0432 g/mol.

To find the number of moles of NH4NO3 in the sample, we can use the formula:

moles = mass / molar mass

Plugging in the given values, we have:

moles = 40.10 g / 80.0432 g/mol = 0.501 mol

Therefore, the sample contains 0.501 moles of NH4NO3 (to the correct number of significant digits).

Answer 2

Lakshmi has a sample of ammonium nitrate (NH4NO3) that has a mass of 40.10 g. She knows that the molar mass of NH4NO3 is 80.0432 g/mol. Divide 40.10 grams to 80.0432 g/mol and you will get 0.5010 moles.