HELP HELP HELP ASAP PLS 10. The questions below refer to the equation:
3 Cu(s) + 8 HNO3(aq) > 3 Cu(NO3)2(aq) + 2 NO(g) + 4 H2O(1)
a) How many moles of NO are produced by the reaction of 4.0 moles of copper with excess
HNO,?
b) How many moles of HNO, are required to react completely with 5.0 moles of copper?
c) How many moles of NO are produced by the reaction of 6.35 grams of Cu with excess
HNO,?

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. 

About 8 gallons of fuel will be used. (8.08)

Answeramino acids;

It is c. lactic acid formation