If a reaction has an actual yield of 15 grams and a theoretical yield of 30 grams, what is the percent yield

50%

Explanation:

You would have to do 15 divided by 30 x 100 to get 50

Percentage Yield = Actual Yield divided by Theoretical Yield

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"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."