What is the molarity of a solution containing 12.25 g of NaBr in 150 mL of solution?

The molarity is  

Explanation:

From the question we are told that

        The mass of  NaBr  

        The volume of the solution is  

The number of moles of NaBr  is

Where   is the molar mass of  NaBr which is a constant with value

   So  

The Molarity is mathematically evaluated as

Substituting values

where is the following

explanation:

"among the transition metal elements, manganese and zinc have a slight lowering of electronegativities. the reason behind this is that the nuclear charges of these elements are slightly weaker than the other transition metal elements due to the way their valence electrons are filled up. both manganese and zinc have their valence electrons filled up to the 4th shell with 1 pair of electrons (4s2) completely occupying it. although the electrons in the 3rd shell (3d) are yet to be paired since the outer most shell is filled up, the ability of the nucleus to attract electrons is lessened. hence,   the electronegativity (or the ability to attract electrons) is lessened."