A 19.51 g sample of impure methylamine, which contains 72.58% (by mass) of CH;NH: , is reacted with 30.81 g of pure oxygen gas: 2.1 4CH, NH,(2) + 90,(8) - 4C0,(8) + 10H,0(?) + 2N;(8) 2.1.1 What is the percentage yield of this reaction if 5.54 g of nitrogen gas is collected? 2.1.2 In another experiment, this impure methylamine was used as follows: • An unknown mass of the impure compound is dissolved in enough water to make 500.0 m of solution. • 20 ml of this solution was transferred by pipette to a clean 250 ml volumetric flask and made up to the mark. • The molarity of the CH;NH; in the final solution was determined to be 0.103 M. Determine the mass of CH;NH; present in the original amount of impure compound used make this solution.
A 19.51 g sample of impure methylamine, which contains 72.58% (by mass) of CH;NH: , is reacted with 30.81 g of pure oxygen gas: 2.1 4CH, NH,(2) + 90,(8) - 4C0,(8) + 10H,0(?) + 2N;(8) 2.1.1 What is the percentage yield of this reaction if 5.54 g of nitrogen gas is collected? 2.1.2 In another experiment, this impure methylamine was used as follows: • An unknown mass of the impure compound is dissolved in enough water to make 500.0 m of solution. • 20 ml of this solution was transferred by pipette to a clean 250 ml volumetric flask and made up to the mark. • The molarity of the CH;NH; in the final solution was determined to be 0.103 M. Determine the mass of CH;NH; present in the original amount of impure compound used make this solution.
Chemistry by OpenStax (2015-05-04)
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Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
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Chapter20: Organic Chemistry
Section: Chapter Questions
Problem 37E: MTBE, Methyl tert -butyl ether, CH3OC(CH3)3, is used as an oxygen source in oxygenated gasolines....
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Transcribed Image Text:A 19.51 g sample of impure methylamine, which contains 72.58% (by mass) of CH;NH: , is
reacted with 30.81 g of pure oxygen gas:
2.1
4CH, NH,(2) + 90,(8) - 4C0,(8) + 10H,0(?) + 2N;(8)
2.1.1
What is the percentage yield of this reaction if 5.54 g of nitrogen gas is collected?
2.1.2 In another experiment, this impure methylamine was used as follows:
• An unknown mass of the impure compound is dissolved in enough water to make 500.0 m
of solution.
• 20 ml of this solution was transferred by pipette to a clean 250 ml volumetric flask and
made up to the mark.
• The molarity of the CH;NH; in the final solution was determined to be 0.103 M.
Determine the mass of CH;NH; present in the original amount of impure compound used
make this solution.
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