6. When silver (Ag) reacts with sulfur (S), the reaction produces silver sulfide (Ag, S). The unbalanced equation is shown below. Balance the chemical equation by adding a coefficient. Note: You cannot balance chemical equations by adding subscripts to any of the chemical formulas of the reactants or products. Ag +S → Ag, S ►

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. 

Hbr dissociates to form h+ and br-ca(oh)2 dissociates to form ca2+ and 2oh-the h+ and oh- react to form waterassuming the reactants are dissolved in water, the net reaction is h+ + oh- —> h2oif you’re asked to show all components of the reaction, the complete reaction is 2hbr + ca(oh)2 —> cabr2 + 2h2o

The answer is c.  h+  and oh−  react to form water (h2o). i just took the test and i got it right. hope this !

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