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|---|---|---|---|---|
| Rank | Domain | PR | Backlinks | Pages in URL |
| 1 | wiki.answers.com | 7 | 1960000 | 11800000 |
| 3 | en.wikipedia.org | 8 | 61800000 | 3750000 |
| 5 | answers.yahoo.com | 8 | 26200000 | 127000000 |
| 7 | chem.lsu.edu | 5 | 1870 | 1850 |
| 8 | teach.beavton.k12.or.us | 3 | 248 | 5300 |
| 9 | sparknotes.com | 6 | 69200 | 480000 |
| 11 | modelscience.com | 5 | 1640 | 481 |
| 12 | siprep.org | 5 | 1350 | 7830 |
| 13 | misterguch.brinkster.net | - | 1320 | 645 |
| 14 | honolulu.hawaii.edu | 6 | 26100 | 6820 |
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|---|---|---|---|---|
| Rank | Domain | PR | Backlinks | Pages in URL |
| 1 | en.wikipedia.org | 8 | 61800000 | 3750000 |
| 3 | chemsite.lsrhs.net | 3 | 173 | |
| 4 | answers.com | 7 | 2160000 | 27100000 |
| 5 | sparknotes.com | 6 | 69200 | 480000 |
| 6 | wiki.answers.com | 7 | 1960000 | 11800000 |
| 7 | cem.msu.edu | 6 | 6110 | 4750 |
| 8 | chem.latech.edu | 4 | 111 | 313 |
| 9 | freshney.org | 5 | 1890 | 454 |
| 10 | apsu.edu | 6 | 21600 | 29700 |
| 11 | mychemistrytutor.com | 4 | 1260 | 5990 |
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|---|---|---|---|---|
| Rank | Domain | PR | Backlinks | Pages in URL |
| 1 | wiki.answers.com | 7 | 1960000 | 11800000 |
| 2 | chem.lsu.edu | 5 | 1870 | 1850 |
| 3 | sparknotes.com | 6 | 69200 | 480000 |
| 4 | explorelearning.com | 6 | 12500 | 4700 |
| 5 | science.uwaterloo.ca | 6 | 7410 | 3740 |
| 6 | misterguch.brinkster.net | - | 1320 | 645 |
| 7 | its-about-time.com | 6 | 1510 | 2510 |
| 8 | freshney.org | 5 | 1890 | 454 |
| 9 | answers.yahoo.com | 8 | 26200000 | 127000000 |
| 10 | chemistry.alanearhart.org | 1 | 65 | 121 |
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