# One thousand grams of seawater would consist of how many grams of dissolved substances?

Typically, seawater contains 3.5% $\text{mass/volume}$...and so your $1000 \cdot g$ of seawater contains about $35 \cdot g$ of salt, principally sodium chloride… Anyway, consult this site for more details. Seawater from the Dead Sea contains approx. ten times this mass of salt.