A- a student has 10.0g sample of CaBr2. Show the setup of the calculation to determine the number of moles of CaBr2 in the sample include units in the setup .(you do not need to do any calculations) B- what number in addition to the answer to part A is needed to determine the number of atoms of Ca in the sample?

C-a different student is given a 10.0g sample labeled CaBr2 that may contain an inert (non reacting) impurity, identify a quantity from the results of a laboratory analysis that the student could use to determine whether the sample is pure.

D-explain why CaCl2 is likely to have properties similar to those of CaBr2