A solution is made by dissolving 85.0 mL of sodium fluoride to water until the final volume is 350.0 mL. Identify the solute in this solution.

A. Sodium flouride
B. Water
C. Sodium fluoride and water
D. Unable to determine

Sodium fluoride

Explanation:

A solution is constituted by two parts: the solute and the solvent (there may be more than 1 solute and more than 1 solvent, but that is not the key of the answer).

Solute is the substace that is dissolved and it is in less amount than the solvent.

Solvent is the substance that can dissolve the solute and it is a greater amount than the solute.

In the given solution:

sodium fluoride, 85.0 mL, is the solute,water, 350.0 mL is the solvent, andthe mixture of both substances is the solution.

Mass is the amount of matter in an object.  weight is the measurement of the pull of gravity on an object.  say for example, you travel to the moon which has a different gravitational field compared to the gravitational field of earth. (gravitational fields: earth = 1, moon = 0.165)  now when you are on the moon, the pull of gravity on you is different than on the earth. and as weight is the measurement of the pull of gravity on an object, that means yes, your weight can and will change on the moon.  however, on the moon, on earth or even on jupiter, the amount of mass inside of you remains the same. meaning your physical mass remains constant.  in conclusion it is possible for your weight to change as your mass remains constant.