Question
Quartz cuvettes are designed to provide a standard value of 1 for this variable. For 10 points each:
[10e] Name this variable symbolized b. Like molarity, it is directly proportional to absorption by Beer’s law.
ANSWER: path length [or distance]
[10h] These devices provide effective path lengths in the kilometers in a form of spectroscopy that measures the time it takes a signal to “ring-down,” allowing the detection of concentrations in the parts-per-billion.
ANSWER: optical cavity [or optical cavities; or optical resonators; accept cavity ring-down (absorption) spectroscopy or Fabry–Pérot etalons; prompt on interferometers]
[10m] Open-path cavity ring-down provides a way to monitor this compound and ammonia at agricultural sites. The EPA uses ground-based atmospheric analysis to detect “fugitive” production of this compound, which can be reduced by flaring at exploration and production operations.
ANSWER: methane [or CH4; prompt on natural gas]
<Chemistry>
Summary
| 2024 ACF Nationals | 2024-04-21 | Y | 11 | 10.00 | 27% | 73% | 0% |
Data
| Toronto B | Claremont Colleges | 0 | 0 | 10 | 10 |
| Berkeley A | Georgia Tech | 10 | 0 | 0 | 10 |
| Chicago A | Indiana | 0 | 0 | 10 | 10 |
| Maryland | Iowa State | 0 | 0 | 10 | 10 |
| Johns Hopkins | Northwestern | 10 | 0 | 10 | 20 |
| Illinois | Michigan | 0 | 0 | 0 | 0 |
| Chicago B | Minnesota A | 10 | 0 | 10 | 20 |
| North Carolina A | Purdue | 0 | 0 | 10 | 10 |
| WUSTL A | Stanford | 0 | 0 | 10 | 10 |
| Columbia A | Waterloo | 0 | 0 | 10 | 10 |
| Toronto A | Yale A | 0 | 0 | 0 | 0 |