If 57 ml of 0.58 m ammonium phosphate and 51 ml of 0.84m calcium acetate are mixed:

a. predict the products to write the balanced chemical equation. be sure to include phase labels. identify the precipitate.

b. write the complete ionic and net ionic reactions. be sure to include ion charges where appropriate!

c. use the amounts of reagents provided to determine the theoretical yield of the precipitate.

d. if 3.941 g of precipitate is actually collected, what is the percent yield?

What are the choices?

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. 

Wow that a lot of text for my tiny so i no wanna answer