The reaction will produce 12.1 g Ag₂S.
<em>Balanced equation</em> = 2Ag + S ⟶ Ag₂S
<em>Mass of Ag₂S</em> = 10.5 g Ag × (1 mol Ag/107.87 g Ag) × (1 mol Ag₂S/2 mol Ag)
× (247.80 g Ag₂S/1 mol Ag₂S) = 12.1 g Ag₂S
D. all of the above, although I do find it hard to believe something like flour would have a melting point, I looked up my answer to double check.
there are 6 moles of oxygen in Zn(No3)2
The one with higher mass has a higher density because it fits more mass into the same amount of space (volume).
Answer:

group 16 period 2 of the periodic table
note: that is not the electronic configuration, that is the Bohr model.