If 35.0 mL of a 0.0500 M HNO3, 35.0 mL of a 0.0600 M KSCN, and 45.0 mL of a 0.0800 M Fe(NO3)3 are combined, what is the initial concentration of SCN- in the mixture?

Explanation:

Chemical equation for the given reaction is as follows.

KSCN is present 35.0 ml of 0.06 M. Hence, we will calculate the total milimoles of as follows.

                  = 2.1 mmoles

Now, we will calculate the total volume in mixture as follows.

      Total volume = (35 + 35 + 45) mL

                             = 115 ml

Hence, initial concentration of will be calculated as follows.

              =

              = 0.0182 M

Thus, we can conclude that the initial concentration of in the mixture is 0.0182 M.

"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."

the number of protons in the nucleus of a given element. has slight luster and conducts electricity at high temperatures like metal.but like a nonmetal,boron is brittle and does not conduct electricity well at low temperatures. in graphite, carbon is a soft,brittle solid.it is reflective,ductile,or malleable.