What happens to the mass of the substances when something dissolves?

If some solute dissolved in solvent the mass of solvent is increased.

Explanation:

Solvent is the liquid that allow some mass to dissolve in it.

Solute is the component that is dissolved in the solvent.

When some solute is dissolved in solvent the total mass of them remains the same but the individual mass changes as both are mixed.

Thus if some solute dissolved in solvent the mass of solvent is increased.

luster is not a good characteristic to use by itself because luster is the property of minerals that indicates how much the surface of a mineral reflects light. the luster of a mineral is affected by the brilliance of the light used to observe the mineral surface.

  distance on the y-axis and time on the x-axis.

explanation:

the instantaneous velocity = change in position/time taken

the slope of the graph should give instantaneous velocity.

  slope of a graph = change in value of y -axis / change in values of x -axis

  comparing both the equations

    change in value of y -axis = change in position

  change in values of x -axis = time taken

so position values should be on the y axis and time values should be on the x axis.

distance on the y-axis and time on the x-axis.