To find the number of moles of neurotoxin in 60 μL containing it, you'll first need to convert the volume to liters because the molecular mass is given in grams per mole (g/mol).
1 liter (L) = 1,000,000 μL
So, 60 μL is equal to 60/1,000,000 = 0.00006 L.
Now, you can use the formula:
Moles (mol) = Mass (g) / Molecular Mass (g/mol)
Given that the molecular mass of the neurotoxin is 150,000 g/mol, you'll need to calculate the mass first.
Mass (g) = Volume (L) x Concentration (g/L)
Since you haven't provided the concentration of the neurotoxin, I'll assume it's dissolved in a solution with a known concentration. Let's assume a concentration of C g/L.
Mass (g) = 0.00006 L x C g/L
Now, you can use the formula to calculate moles:
Moles (mol) = Mass (g) / Molecular Mass (g/mol)
Moles (mol) = (0.00006 L x C g/L) / 150,000 g/mol
Moles (mol) = (0.00006 / 150,000) x C
Moles (mol) = (0.0000004) x C
So, the number of moles of neurotoxin in the 60 μL solution depends on the concentration (C) of the neurotoxin in the solution. Without knowing the concentration, it's not possible to provide a specific value for moles. You would need to know the concentration to calculate the moles accurately.