Answer
a balance and a graduated cylinder
Explanation
Density is mass per unit and it is property characteristic of a substance. The arrangement of the mass of atoms and their size is what determines the the density of a substance.
For a student to measure the density of seawater he/she is required to use a balance and a graduated cylinder where a balance will be used to measure the mass of the mineral sample and then a graduated cylinder to determine the volume.
Concentration gradient across the membrane. Proteins in the membrane allow specific molecules through, passively.
I think so??.. idk though cause i’m not that smart but idk
A because if you add and do the equation to all the cups
I think it's B.) Hall of fame