Pls help Chromium metal reacts with zinc nitrate to form zinc metal
and chromium(II) nitrate. If 11.25 grams of zinc nitrate was present at the start of a chemical reaction, how many grams of zinc metal can be
collected? Determine the percent yield if the reaction actually produced 2.50 grams of zinc metal.

Achange in the number of neutrons in an atom will change an blank . when the number of protons changes in an atom, a new element will form.

Me i dont know what to do! the table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.

Ineed to find the answer of this question because i dont understand it