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#### xeomonk

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##### Consecutive Reactions
« on: September 26, 2008, 10:42:48 AM »

Hi I am having trouble in this problem.

What mass of melamine will be obtained from 145.5 kg of urea if the yield of the overall reaction is 81.0%?

First I calculated the number of kilomoles of urea

2.43 kmol

After I figured out the ratio between urea and melamine

which is 6

Then I figure out the molar mass of melamine

which is 126.0  kg/kmol

This is the part where I get stuck. I cannot figure out the next step to solving this problem.
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#### Borek

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##### Re: Consecutive Reactions
« Reply #1 on: September 26, 2008, 12:12:42 PM »

What is the percentage yield definition? Write it and solve for the practical mass.
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