Identify the polymer based on each description. A rigid, brittle polymer used in disposable food containers. The backbone of the polymer contains phenyl rings. Choose... A flexible polymer used in the manufacturing of grocery bags. The molecular structure is (C2H4)n Choose... A polymer produced through a condensation reaction, with applications ranging from clothing to packaging. Choose... A rigid polymer used often in construction materials. The structure contains a halogen. Choose... Choose... High-density polyethylene Polyethylene terephthalate Polyvinyl chloride Polystyrene

29.1-12=17.1the answer is this one

The mass has escaped into a gas which you can not see so the law stays true.

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.