Acommon stain remover is sold as a concentrated solution of sodium hypochlorite (naocl). diluting 55 milliliters of the concentrated solution to a total volume of 220 milliliters creates a solution that is a 0.40 m sodium hypochlorite. what was the molarity of the original concentrated solution?
0.10 m
0.80 m
1.6 m
6.3 m

To solve this we use the equation, 

M1V1 = M2V2

where M1 is the concentration of the stock solution, V1 is the volume of the stock solution, M2 is the concentration of the new solution and V2 is its volume.

M1 (55 mL) = (0.40 M)(220 mL)

M1 = 1.6 M <OPTION 3

the seeing the electronic configuration we can say that the element is fluorine.

fluorine is the most electronegative element in the periodic table.

but by only seeing the configuration we cannot say about its reactivity because we don't know if its configuration after excitation or by addition of electrons.

but if not then, it is the lightest halogen and exists as a highly toxic pale yellow diatomic gas at standard conditions. as the most electronegative element, it is extremely reactive: almost all other elements, including some noble gases, form compounds with fluorine.

d) a person who learns about the world by observing it.

explanation:

scientist are people who discover why and how things are done and made in the world.