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

Ithinks its false. tell me if im wrong

Mass is the amount of matter in an object.  weight is the measurement of the pull of gravity on an object.  say for example, you travel to the moon which has a different gravitational field compared to the gravitational field of earth. (gravitational fields: earth = 1, moon = 0.165)  now when you are on the moon, the pull of gravity on you is different than on the earth. and as weight is the measurement of the pull of gravity on an object, that means yes, your weight can and will change on the moon.  however, on the moon, on earth or even on jupiter, the amount of mass inside of you remains the same. meaning your physical mass remains constant.  in conclusion it is possible for your weight to change as your mass remains constant.