Stockings inc. is making nylon 6,6 in 8 hour shifts. one batch is produced per shift using equimolar amounts of the reactants with a conversion of 99%. after each run the product is extruded and chopped into pellets.

a. what is the number average molecular weight?

b. the afternoon shift operator dumped in too much adipic acid. from her records you calculate that the molar ratio was 2% excess adipic acid. assuming the batch went to the usual conversion what was mn ?

c. the night shift operator weighed everything correctly but fell asleep and let the reaction run too long to 99.5% conversion. what is mn for this batch?

d. how should the engineer mix these batches to come within ±10% of the usual specification of mn ? what will be mw ?

e. what would happen to mn and mw if the mixture is heated?

a mercury barometer is a device that uses the physical properties of mercury in a tube to measure barometric pressure. mercury barometers are used for : -

1. measurement of atmospheric pressure  

2. determining the altitude of a place

3. weather forecasting

4. calibration and checking of aneroid barometers

5. application in fluid mechanics

6. measurement of pressure in aircrafts

7. surface weather analysis

8. preparation of barographs

9. usage in physical sciences like physics, astronomy & chemistry

10. preparation of aircraft altimeters

characteristics of mercury barometer : -

1.used to define and measure atmospheric pressure.

2.on the average at sea level the column of mercury rises to a height of about 760 mm.

3.this quantity is equal to 1 atmosphere.

4.it is also known as standard atmospheric pressure.

5.a barometer in which the weight of a column of mercury in a glass tube with a sealed top is balanced against that of the atmosphere pressing on an exposed cistern of mercury at the base of the mercury column, the height of the column varying with atmospheric pressure.

c. 75.7

i think that is the right

po-215 i got it right on the quiz