What’s the molar mass for zinc nitrate?

i am failing my chemistry test right now

Use the periodic table to determine the electron configuration of dysprosium (dy) and americium (am) in noble-gas notation.

Sally is making a model of a magnesium atom with an atomic mass number of 24 for her chemistry class. she has foam balls for the protons, neutrons, and electrons. she has added 6 neutrons to her model so far. how many more neutrons does she need to add to complete her neutral atom of magnesium?

What type of reaction fuels the processes seen here?