Question

What is the quantity of solute in moles, delivered to a dilute solution?

2.00mL of 0.0400 M solution was added

Enter in e-notation

What are the steps I need to complete?

Answer 1

divide the concentration (0.0400M) by the volume (in L) to find the number of moles

n= M/V (in L)

The 0.0400M is telling you that you have 0.0400 moles of solute in one liter of solution. And your problem as how many moles are in 2mL

Answer 2

how does it end up in e-notation?

Answer 3

Sorry, I said you have to divide, that is wrong, you have to multiply the Molarity by the volume to find the number of moles
n= M x V (in L)
n= 0.0400M x 2.00 x 10^(-3)
n= 8x10^(-5) mol