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Problem 90

(a) The molecular formula of acetylsalicylic acid…

Problem 89

The effectiveness of nitrogen fertilizers depends on both their ability to deliver nitrogen to plants and the amount of nitrogen they can deliver. Four common nitrogen-containing fertilizers are ammonia, ammonium nitrate, ammonium sulfate, and urea $\left[\left(\mathrm{NH}_{2}\right)_{2} \mathrm{CO}\right]$ . Rank these fertilizers in terms of the mass percentage nitrogen they contain.


From highest percent N to lowest: ammonia, urea, ammonium nitrate, ammonium sulfate



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Video Transcript

for split. We need to calculate the percent by mass off nitrogen in the falling compounds for first in its tree. Atomic weight. Nitrogen 14 hydrogen three into one gives us total Molecular veda 17. So person dates can be calculated as number off Factum Mile. Deep light with the atomic weight divided by the molecular formula. Wait in 200 Doing that, we have the mask percentage off my Trojan in image three as 82.2%. Using the same method, we need to data mine for all off the compounds for second compound. The mass percent ace turns out to be 34.9 for third compound. It is 21. This is the second company. Here is the toad on DDE. For the third compound, it is 21.2. For the food compound, it is. Be right, it's in. It's too two. Then see Oh, sweet gives us to into 14 plus four in tow. One plus 12 lust. 16. So the total more legal form love it is 60.4 on the percentage nitrogen turns out to be to into 14 divided by 60 Foreign deal for into 100 were to give those 46 point six blessing. No. We have to rank the fertilizer in order off decreasing percentage. So the highest percentage goes to in its three. Then manage to go c o after. Would it goes Toe image four. There's no three further along. It goes to image. Four Do. It's so for.