Please help me

For this discussion I choose,

Molecule:Li3N

Mass: 1G

Volume: 500 ml

For your initial post pick a combination of one of the following molecules, one mass quantity, and one total solution volume from this table. You may not use the same combination as another student so be sure to read any existing peers postings before posting your own. For example, one possible combination would be 2 grams of NaCl in 500ml of solution. Then, give each of the following for your unique combination being sure to show all of your work: 1. \%mass/volume concentration 2. Molarity 3. Osmolarity