IChE Assignment # 5 Due: September 13, 2011 at 9:09 am Make the following unit conversions both by...

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IChE Assignment # 5 Due: September 13, 2011 at 9:09 am Make the following unit conversions both by hand and by using a spreadsheet: XXXXXXXXXXpounds mass (lbm) to grams (g XXXXXXXXXXliters (L) to cubic feet (ft XXXXXXXXXXdegrees Fahrenheit (o F) to degrees centigrade (o C XXXXXXXXXXcm/s to mi/hr (5) The force of 20 lbm falling immediately above the earth’s surface in lbf. Do once with gc. (6) Air has the following mole percentage: N2 78.03% O2 20.99% Ar 0.94% What are the mass fractions of these components? (7) Professor Pease overheard a patient at a pharmacy ask if 500 ?g was the same as 5 mg. What do you think? Justify your answer. This matters because the patient was only supposed to take 1000 ?g/dose.
	
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Due: September 13, 2011 at 9:09 am

Make the following unit conversions both by hand and by using a spreadsheet:  
 XXXXXXXXXXpounds mass (lb ) to grams (g)  
m
3
(2) 41 liters (L) to cubic feet (ft )  
o o
 XXXXXXXXXXdegrees Fahrenheit ( F) to degrees centigrade ( C)  
 XXXXXXXXXXcm/s to mi/hr  
(5) The force of 20 lb falling immediately above the earth’s surface in lb .  Do once 
m f
with g .  
c
(6) Air has the following mole percentage:  
  N 78.03%  
2
  O 20.99%  
2
  Ar 0.94%  
 What are the mass fractions of these components? 
(7) Professor Pease overheard a patient at a pharmacy ask if 500 ?g was the same 
as 5 mg.  What do you think?  Justify your answer.  This matters because the 
patient was only supposed to take 1000 ?g/dose.

David · Accepted Answer

Given:
5. The force of 20 lbm falling immediately above the earth’s surface in lbf. Do once 
with gc.
Solution:
In the British system, weight is measured in pounds-force (lbf) and  mass is measured in pounds-
mass (lbm) where 1 lbf = 1 lbm* 32.2 ft/s
2

So,  given 20 lbm can be expressed in lbf as follows:
= 20 * 32.2 ft/s
2
= 644 lbf
6. Air has the following mole percentage:
N2 - 78.03% 
O2 - 20.99% 
Ar - 0.

IChE Assignment # 5 Due: September 13, 2011 at 9:09 am Make the following unit conversions both by hand and by using a spreadsheet: XXXXXXXXXXpounds mass (lbm) to grams (g XXXXXXXXXXliters (L) to...

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