Question
If you include the coal used by the furnace, the synthesis of this binary ionic compound alone causes 8 percent of global carbon emissions. For 10 points each:
[10m] Name this major component of cement that’s made by baking limestone in a kiln until it releases a molecule of CO2 (“C-O-two”). A chemical formula alone is acceptable.
ANSWER: calcium oxide [or CaO; or quicklime; or burnt lime; prompt on lime]
[10h] Green chemists prefer geopolymer cements made from the oxides of these two elements, since they don’t emit stoichiometric CO2. Most zeolites are oxides of these two elements.
ANSWER: aluminum AND silicon [or Al and Si; or aluminosilicates]
[10e] Instead of a furnace, geopolymer cements are made simply by treating aluminosilicate minerals with a strong one of these chemicals, such as sodium or potassium hydroxide.
ANSWER: strong bases [accept Arrhenius bases or Bronsted–Lowry bases or Lewis bases; accept alkali]
<Abhinav Rachakonda, Science - Chemistry> ~22948~ <Editor: Adam Silverman>
Data
| Team | Opponent | Part 1 | Part 2 | Part 3 | Total |
|---|---|---|---|---|---|
| Heights | Innovation Academy A | 0 | 0 | 0 | 0 |
| Johns Creek A | Hunter A | 0 | 0 | 10 | 10 |
| Kinkaid | Belmont | 0 | 0 | 10 | 10 |
| Winston Churchill A | Hoover A | 0 | 0 | 10 | 10 |
Summary
| Tournament | Edition | Exact Match? | Heard | PPB | Easy % | Medium % | Hard % |
|---|---|---|---|---|---|---|---|
| 2024 PACE NSC | 06/08/2024 | Y | 4 | 7.50 | 75% | 0% | 0% |