A20.0 ml sample of a nacl solution has a mass of 21.040 g. after the solution is evaporated to dryness, the dry salt residue has a mass of 4.348 g. calculate the following concentrations for the nacl solution.
a) mass/mass%
b) mass/volume%
c) molarity (m)

What is the polyatamic ion of borate

Which buffer would be better able to hold a steady ph on the addition of strong acid, buffer 1 or buffer 2? explain. buffer 1: a solution containing 0.10 m nh4cl and 1 m nh3. buffer 2: a solution containing 1 m nh4cl and 0.10 m nh3

In a ni-cd battery, a fully charged cell is composed of nickelic hydroxide. nickel is an element that has multiple oxidation states. assume the following proportions of the states: nickel charge proportions found 0 0.17 +2 0.3 +3 0.33 +4 0.5 (a) determine the mean of the nickel charge. enter the answer to 2 decimal places.(b) determine the cumulative distribution function of nickel charge.