How many moles of ammonia contain each of the following number of molecules?
Note: Reference the Fundamental constants table for additional information.
Be sure your answer has the correct number of significant figures.
3.84x10^26 molecules
9.41x10^21 molecules
2.0x10^23 molecules
To calculate the number of moles, we will use the Avogadro's number, which is 6.022 x 10^23 molecules/mol.
1. For 3.84x10^26 molecules:
Number of moles = 3.84x10^26 molecules / 6.022 x 10^23 molecules/mol
Number of moles = 63.9 mol (rounded to 3 significant figures)
2. For 9.41x10^21 molecules:
Number of moles = 9.41x10^21 molecules / 6.022 x 10^23 molecules/mol
Number of moles = 0.0156 mol (rounded to 3 significant figures)
3. For 2.0x10^23 molecules:
Number of moles = 2.0x10^23 molecules / 6.022 x 10^23 molecules/mol
Number of moles = 0.331 mol (rounded to 3 significant figures)