How many moles of NaOH are produced from the reaction of 17.5 moles of Na2O?

The number of mole of NaOH produced from the reaction is 35 moles

Balanced equation

Na₂O + H₂O —> 2NaOH

From the balanced equation above,

1 mole of Na₂O reacted to produce 2 moles of NaOH.

How to determine the mole of NaOH

From the balanced equation above,

1 mole of Na₂O reacted to produce 2 moles of NaOH.

Therefore,

17.5 moles of Na₂O will react to produce = (17.5 × 2) = 35 moles of NaOH.

Thus, 35 moles of NaOH were obtained from the reaction.

Learn more about stoichiometry:

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.