Why does warm water move faster than cold water?

Asolution contains 225 g of sodium chloride, nacl, dissolved in enough water to make a 0.25 l of solution. what is the molarity of the solution? a. 3.88 m, b. 1.03 m, c. 1.5 m, d. 15.5 m

What is the number of moles of chemical units represented by 9.03x10^24? and how do i show work? (dumb it down )

The atomic number, or number, is the described as the number of in the nucleus of an chemical element.