Which best describes the reducing agent in the reaction below? cl2(aq)+2br-(> 2cl-(aq)+br2(aq) a. bromine (br) loses an electron, so it is the reducing agent. b. bromine (br) gains an electron, so it is the reducing agent. c. chlorine (cl) loses an electron, so it is the reducing agent. d. chlorine (cl) gains an electron, so it is the reducing agent.

Hi.

First you should know the definition and role of a reducing agent. A reducing agent is a substance in a chemical reaction which causes reduction of the other substance by losing electrons.

In the given chemical reaction following changes are occuring:
a) Chlorine is gaining electrons as it is being transformed from neutral atom to negative ion.
b) Bromine is losing electrons as it is being transformed from negative ion to neutral atom

Chlorine is gaining electrons so it is being reduced. Bromine is giving or losing electrons and is reducing the chlorine atoms so Bromine is the reducing agent.

Hence option A is correct. Bromine is losing electrons, so it is the reducing agent.  

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.