Sodium- Na
most active element- Fluorine
lightest element- Hydrogen
C.Pennsylvania Titusville is in the state of Pennsylvania
The bad smelling element is Sulfur, which smells like rotting eggs.
Answer : The volume of 3.0 M spinach solution added should be, 50 mL
Explanation :
Formula used :

where,
are the initial molarity and volume of spinach solution.
are the final molarity and volume of diluted spinach solution.
We are given:

Now put all the given values in above equation, we get:

Hence, the volume of 3.0 M spinach solution added should be, 50 mL