Question

2. You have 400 mL of a 4 M solution. How many moles are present?

Answer 1

1.6moles

Explanations:

The formula for calculating the molarity of a solution is expressed according to the equation:

`molarity=(moles)/(volume)`

Given the following parameters

volume of solution = 400mL = 0.4L

molarity of the solution = 4M

Determine the moles present

`\begin{gathered} moles=molarity* volume \\ moles=(4mol)/(L)*0.4L \\ moles=1.6moles \end{gathered}`

Hence the number of moles present is 1.6moles