Here's how to figure that out:

* Molybdenum is a transition metal with a symbol Mo.

* Nitrate is a polyatomic ion with the formula NO₃⁻.

* Molybdenum typically forms a +3 charge (Mo³⁺) in its ionic compounds.

* To balance the charges, you need three nitrate ions (3 x -1 = -3) for every one molybdenum ion (+3).

This gives you the final formula: Mo(NO₃)₃.