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1) You are given an unknown containingKClO₃.
Following the procedure in your manual, you obtain the followingfictional data
Note!

Mass of empty testtube	54.5679 g
Mass of test tube +unknown	54.8523 g
Mass of test tube +unknown + MnO2	54.9786 g
Mass of erlenmeyerflask with residual water	308.81 g
Mass of erlenmeyerflask filled with water	364.23 g
Atmospheric pressure	754.9 mmHg
Temperature of water	38.5 °C
Partial pressure of water at38.5	37.94 mmHg
Mass of test tube +Residue after heating	54.9032 g
Density ofwater	.996 g/mL

Calculate:

A) Molar volume of Oxygen
   (a) Volume of Oxygen collected	_______________ mL
  (b) Partial pressure of dryoxygen	_______________ mmHg
  (c) Volume of oxygen corrected toSTP	_______________ mL
  (d) Mass of oxygen produced	_______________ g
  (e) Moles of oxygen gas produced	_______________ mol
  (f) Calculated molar volume atSTP	_______________ L/mol
B) Per cent KClO3 inunknown
  (g) Mass of unknown used	_______________ g
  (h) Moles ofKClO3	_______________ mol
  (i) Mass of KClO3 in unknown	_______________ g
  (j) Per cent KClO3 inunknown	_______________ %
C) Residual \"KCl??\" fromUNKNOWN     Â
  (k) Mass of residual KCl? produced fromUNKNOWN	_______________ g
  (l) Theoretical yield of KCl if UNKNOWN is100% KClO3	_______________ g
  (m) % Yield of \"KCl\" based on k and labove	_______________ %

2) Look up in the handbook orelsewhere....

the actual vapor pressure of water at 38.5 °C	_______________ mmHg

3) Know....
How accurately you will measure the volumes andweights?
How accurately you will be able to measure molar volume, %KClO₃
What is the function of MnO₂, the leveling tank
When do you use the Triple Beam Balance and the Analytical Balanceand why.
Then think how would your results be affectedIF...:
You started with a wet test tube?
You made an error in one or more of your weighings?
You made an error of 1 cm in using the leveling tank?