| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| a 15g mass of nitrogen gas is enclosed | 0.36 | 1 | 4361 | 14 |
| a 15g mass of nitrogen | 1.98 | 0.4 | 1784 | 17 |
| a 15g mass of nitrogen gas | 1.19 | 0.1 | 3328 | 50 |
| mass number of nitrogen 15 | 1.25 | 0.6 | 5300 | 77 |
| what is the mass of nitrogen-15 | 0.15 | 0.7 | 2452 | 89 |
| atomic mass of nitrogen-15 | 1.47 | 0.3 | 1674 | 95 |
| atomic number of nitrogen 15 | 0.75 | 0.9 | 8349 | 60 |
| mass of nitrogen 14 | 0.07 | 0.7 | 9101 | 82 |
| the mass of nitrogen | 0.3 | 0.3 | 6490 | 28 |
| mass number of nitrogen 14 | 0.04 | 0.5 | 6576 | 85 |
| the atomic mass of nitrogen | 1.8 | 0.3 | 7771 | 43 |
| atomic mass of nitrogen 14 | 0.4 | 0.2 | 7406 | 87 |
| gram atomic mass of nitrogen | 1.23 | 0.1 | 8572 | 4 |
| atomic mass of nitrogen in grams | 0.37 | 0.8 | 8742 | 71 |
| the mass number of nitrogen | 1.41 | 0.7 | 7639 | 40 |
| exact mass of nitrogen | 0.02 | 0.8 | 7786 | 86 |
| atomic mass of nitrogen gas | 1.68 | 0.2 | 7011 | 86 |
| nitrogen 14 and nitrogen 15 | 1.73 | 1 | 4522 | 95 |
| mass of nitrogen gas | 0.39 | 0.9 | 6925 | 100 |
| mass of 28.09 g of nitrogen | 1.75 | 0.8 | 8470 | 21 |
