Final answer:
To find the number of molecules in 0.56 moles of NH3, multiply the number of moles by Avogadro's number, which is 6.022 x 10^23 molecules/mole.
Step-by-step explanation:
To determine the number of molecules in 0.56 moles of NH3, we can use Avogadro's number, which is 6.022 x 10^23 molecules/mole. Multiply the number of moles by Avogadro's number to find the number of molecules:
0.56 moles NH3 x (6.022 x 10^23 molecules/mole) = 3.37 x 10^23 molecules NH3