Abuffer is made up of 350 ml each of 0.20 m hf and 0.14 m naf. assuming that volumes are additive, calculate a) the ph of the buffer solution. b) the ph of the buffer after the addition of 0.030 mol of koh to the above buffer c determine the number of moles of hci would have to be added to the buffer (in a) to make the ph decreases by 1.50 ph unit. is this solution still an effective buffer? briefly explain in terms of buffer capacity

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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.