Rank these elements according to first ionization kr, br, se, as, ge, ga, ca, k

Kr> Br> As> Se> Ge> Ca> Ga > K 

What are the options? physical property can be color, smell, opacity, viscosity, density, infra red spectrum, melting and boiling points, attraction and repulson to magnets, etc.

Molarity is moles of solute over liters of solution. idk if that is what you are talking about, but you can convert moles of solute to grams of solute using dimensional analyzes by using molar mass found on the periodic table.