Henry's law: saturation of water with oxygen a solution with oxygen dissolved in water containing 0.5 mg 0,/100 g of h. o is brought in contact with a large volume of atmospheric air at 283 k and a total pressure of 1 atm. the henry's law constant for the oxygen-water system at 283 k equals 32,700 atm/mol fraction. (a) will the solution gain or lose oxygen? (b) what will be the concentration of oxygen in the equilibrium solution?

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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.