When conducting an experiment in the lab, a student was able to actually recover 31.3 grams of Zinc Chloride. Using the balanced chemical equation (2NaHCO3 → Na2CO3 + CO2 + H2O) the student predicted that they theoretically should have been able to make 49.1 grams of Zinc Chloride.

What was the percent yield of this reaction?

at the bottom

explanation:

the answer is true.

"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."