There are approximately 1.245 x 10^(-4) moles of ammonia (NH3) in 7.5 x 10^19 molecules.
To convert from this huge number of molecules to moles, we enlist a magical number called Avogadro's constant – roughly 6.022 x 10^23, like a cosmic conversion rate between individual builders and their organized teams. Dividing our mountain of molecules (7.5 x 10^19) by this constant reveals a much smaller team size: approximately 1.245 x 10^(-4) moles.
Divide the number of molecules by Avogadro's number:
Number of moles = (7.5 x 10^19 molecules) / (6.022 x 10^23 molecules/mole)
Simplify the expression:
Number of moles ≈ 1.245 x 10^19 / 6.022 x 10^23
Number of moles ≈ 1.245 x 10^(-4)
Therefore, 7.5 x 10^19 molecules of ammonia is equivalent to about 1.245 x 10^(-4) moles.
The question probably maybe:
How many moles are in 7.5 x 10 19 molecules of ammonia, NH3?