Calculate whether or not a precipitate will form if 2.00 mL of 0.60 M NH3 is added to 1.0 L of 1.0 × 10−3 M FeSO4. I want the final number too

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.

56 moles of   lieter in chemistry