Calculate the mass percent for a solution containing 85g NaCl and 155g water.

The mass percent for a solution : 35.42%

The concentration of a substance can be expressed in several quantities such as moles, percent (%) weight/volume,), molarity, molality, parts per million (ppm) or mole fraction. The concentration shows the amount of solute in a unit of the amount of solvent.

mass solute = 85 g

mass solution = 85 + 155 = 240 g

a polar bond is formed when electrons are shared unevenly between atoms

what is the average time it took the car to travel 0.25 meters?

⇒ 2.23 seconds

what is the average time it took the car to travel 0.50 meters?

⇒ 3.13 seconds