Which of the following buffer systems would yield a pH of around 2? H2S04 and NaHSO4
B
H3PO4 and NaH2P04
C
HF and NaF
HC2H302 and NaC2H302
ما
E
NH3 and NHAOH

Because a model would make the investigation easier to understand

Adozen is 1221/12 = 1.751.75 x 12 = 21therefore, 1.75 is the answer.

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.