When the equation ca(oh)2 + hbr (products) is completed and balanced, one term in the equation will be

This is a double-replacement reaction. You can predict the products if you rearrange the combination of the two elements. Take the metal of the first reactant with the nonmetal of the second reactant. Then, take the metal of the second reactant with the nonmetal of the first reactant. This is how it happens:

Ca(OH)₂ + 2 HBr --> CaBr₂ + 2 H₂O

Ok where is the image ?

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.