Asolution is prepared by dissolving 20 g naoh (fw = 400 g/mol) to 255 ml of solution. if the density of the solution is 1.15 gim, what is the mass percent naoh in the solution? 0.68% 0.78% 0.90% 6.8% 78% nt navigator

6.82% is the mass percent NaOH in the solution.

Explanation:

Mass of the solute that is NaOH = m = 20 g

Mass of the solution = M

Volume of the solution = V = 255 mL

Density of the solution = d = 1.15 g/mL

M = 293.25 g

Mass percentage of solute :(w/w)%

6.82% is the mass percent NaOH in the solution.

sodium (na), for example, has one electron in its valence shell. this is an unstable state because that valence shell needs eight electrons to be full. in order to fill its valence shell, find a way to add seven electrons to its valence shell

he uptake of drugs from the intestine is often strongly influenced by diffusion. for example, consider a water-insoluble steroid for treating inflammation that is solubilized in aggregates of detergent molecules, called micelles. these micelles, aggregates of 80 soap molecules, have a molecular weight of 24,000, a diameter of 2.6 nm, and a charge of -27. the positively charge ions (counterions) in this system are na".