9. when the name of the anion that is part of an acid ends in –ate the acid name includes the suffix *
a. -ous
b. -ic
c. -ate
d. -ite
10. in any chemical compound, the elements are always combined in the same proportion by mass. this is due to the law of proportions. *
a. unequal
b. definite
c. multiple
d. unending

9. B ( when an anion forms with acid it name always include suffix " ic".

10.C

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. 

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