A chemist prepares a solution of calcium bromide CaBr2 by measuring out 0.54kg of calcium bromide into a 450.mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in /molL of the chemist's calcium bromide solution. Round your answer to 2 significant digits.

Ithink its solid. hope this

Ithink about 50 % of an original isotope's number of atoms remain

The question is incomplete. complete question is attached belowanswer: correct answer is option b  i.e.  solid particles  reason: filter paper has small pores, through which smaller particles can pass through. however, solid particles  have relatively larger size. hence, they are least likely to pass through.

3is your answer to yuor question