A distillation column is separating methanol, ethanol, and butanol at a pressure of 2 atm. The column has a total condenser and a partial re-boiler. The feed is saturated liquid with the flow rate of 100 kmol/h comprising 45 mol% methanol, 30% ethanol, and 25% butanol. The external reflux ratio is 2.0, and the reflux is a saturated liquid. We desire a 98% recovery of ethanol in the distillate and a 99.1% recovery of butanol in the bottom product. The distillate product flow rate (D) in kmol per

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. 

Acovalent bond is formed between the two hydrogen bonds

Answer:

5.6⋅10−^19  j

do you need the explaination?