You were asked to notice that the rim of the porcelain evaporating dish is unglazed, and observe what water will do to the unglazed side of the piece of terra cotta plant pot on your tray. This is why we preheated the evaporating dish prior to measuring the evaporating dishes initial mass. Brian suggests to Matt that if the evaporating dish was not preheated, the mass of the anhydrate will be heavier resulting in a greater value for the anhydrate, and a smaller value for “z” in this formula, CuxCly • zH2O. Do you agree or disagree? Justify your answer.

The correct name for n3-ion should be azide.

Coal i believe hope this

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.