Can someone pls me with number 8? ~

So we can use the equation:

where M is the concentration and V is the volume in liters.

We can then solve for how much of the stock solution we are going to put into the new solution:

Then we can solve for V_{2}:

So now we know that we need to use 150 mL of the stock solution in the new solution - and we know that the total volume of the new solution is 500 mL. So therefore the rest of the new solution should be water:

So the rest of the solution (350 mL) is water.

the endocrine system secretes hormones into blood and other body fluids. these chemicals are important for metabolism, growth, water and mineral balance, and the response to stress. hormones provide feedback to the brain to affect neural processing. reproductive hormones affect the development of the nervous system.