If I add 25 grams of Fe(OH)2 to 25 ml of water, what is the percent by mass of Iron (II) hydroxide in this solution?

50%

Explanation:

Step 1: Calculate the mass of water

Since we don't know the actual temperature at which the solution is prepared, we will assume the density of water is about 1 g/mL.

Step 2: Calculate the mass of the solution

The mass of the solution is the sum of the mass of the solute (Iron (III) hydroxide) and the mass of the solvent (water).

Step 3: Calculate the percent by mass of Iron (III) hydroxide in the solution

the answer to your question is c

the correct answer is b. a strong acid completely dissociates to its ions when dissolved in water. completely dissociates to and ions. a is incorrect because does not fully ionize to and ions and some remain as the compound . c and d are incorrect because, and do not fall into the category of bronsted lowry acids. a bronsted lowry acid is a proton donor and since both molecules do not have a proton to donate they are not bronsted lowry acids. likewise,   if we use the lewis acid definition, they cannot be acids. a lewis acid is an electron pair acceptor. both and have a complete octet so can not accept any electrons which disqualifies them as acids.