Aluminum reacts with Oxygen gas to form Aluminum Oxide: 4 Al + 3 O2 --> 2 Al2O3. If you are given 176.9 grams of aluminum how many moles of oxygen would you need to react all of the aluminum? A.1.640 mol O2
B. 4.917 mol O2
C. 3.278 mol O2
D. 6.556 mol O2
E. 19.70 mol O2
F. None of the above

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. 

A. burning woodcombustion is the process of burning something. make brainliest if correct

H tricky one let me think and get back to u

Self-ionizes to form an equilibruium system in which [ h_{3} o^{+} ]=[ oh^{-} ]=10^{-7} m