Question breakdown in Lithium Carbonate from Desert Brine (Q16–Q20)
| Question | Response Type | Topic | NYSP12SLS Standard | Action |
|---|---|---|---|---|
| Question 16 | 1-credit Multiple Choice (4 options) | Solutions | HS-PS1-10 | Solve in workspace → |
| Question 17 | 1-credit Constructed Response (rubric-scored) | Stoichiometry and conservation | HS-PS1-7 | Solve in workspace → |
| Question 18 | 1-credit Multiple Choice (4 options) | Solutions | HS-PS1-10 | Solve in workspace → |
| Question 19 | 1-credit Constructed Response (rubric-scored) | Solutions | HS-PS1-10 | Solve in workspace → |
| Question 20 | 1-credit Constructed Response (rubric-scored) | Bonding and formulas | HS-PS1-2 | Solve in workspace → |
Other clusters in Independent Chemistry Practice Examination A
| Questions | Cluster & Topics | Format | Practice |
|---|---|---|---|
| 1–5 | The Oklo Uranium DepositA uranium deposit low in U-235: isotopes, beta decay equations, Group 18 trends, and evidence from neodymium isotopesNuclear chemistry · Periodic patterns · Engineering design (HS-PS1-8, HS-PS1-1, HS-ETS1-3) | 3 MC, 2 CR | Practice cluster |
| 6–10 | GalliumMendeleev's gap and gallium LEDs: valence electrons and formulas, periodic trends, metallic bonding, light frequencyPeriodic patterns · Materials and structure · Electromagnetic radiation (HS-PS1-1, HS-PS2-6, HS-PS4-4) | 3 MC, 2 CR | Practice cluster |
| 11–15 | Flying in Air That Is Barely ThereNASA's Ingenuity in thin Mars air: particle density, pressure–volume graphs, the combined gas law, specific heatEngineering design · Gases · Energy calculations (HS-ETS1-3, HS-PS1-9, HS-PS3-1) | 3 MC, 2 CR | Practice cluster |
| 21–25 | Seawater Chemistry at an Oyster HatcheryCO₂-rich upwelling at an oyster hatchery: pH and hydronium ions, carbonate equations, proton donors, collision theoryAcids and bases · Stoichiometry and conservation · Reaction rates (HS-PS1-11, HS-PS1-7, HS-PS1-5) | 3 MC, 2 CR | Practice cluster |
| 26–30 | A Library’s Slow Chemical FireAcidic library paper turning brittle: potential energy diagrams, acids and bases, mass stoichiometry, and specific heatThermochemistry · Solutions · Reaction rates · Stoichiometry and conservation · Energy calculations (HS-PS1-4, HS-PS1-10, HS-PS1-5, HS-PS1-7, HS-PS3-1) | 3 MC, 2 CR | Practice cluster |
| 31–35 | A Warning Inside the Sealed BagCobalt chloride humidity cards for chip bags: concentration, percent water in a hydrate, Le Châtelier's principleSolutions · Stoichiometry and conservation · Equilibrium · Thermochemistry · Engineering design (HS-PS1-10, HS-PS1-7, HS-PS1-6, HS-PS1-4, HS-ETS1-4) | 3 MC, 2 CR | Practice cluster |
| 36–40 | A Window That Stores Its TintSmart windows tinted by lithium ions: half-reactions, oxidation numbers, energy conversion, attraction between chargesOxidation and reduction · Periodic patterns · Electric forces and energy (HS-PS1-12, HS-PS1-1, HS-PS3-5) | 3 MC, 2 CR | Practice cluster |
| 41–45 | How Long Can a Cold Box Stay Cold?Dry ice cooling test parts in a vented box: heat of sublimation, specific heat, phase changes, intermolecular forcesEnergy calculations · Periodic patterns · Intermolecular forces (HS-PS3-1, HS-PS1-1, HS-PS1-3) | 2 MC, 3 CR | Practice cluster |
| 46–50 | Red Snow and Absorbed SunlightPink snow algae speeding snowmelt: photon energy and wavelength, heat of fusion, photosynthesis, and reflectanceElectromagnetic radiation · Energy calculations · Photosynthesis · Engineering design (HS-PS4-4, HS-PS3-1, HS-LS1-5, HS-ETS1-2) | 3 MC, 2 CR | Practice cluster |
Frequently asked questions
- How is Lithium Carbonate from Desert Brine · Independent Chemistry Practice Examination A Chemistry Regents Cluster (Q16–Q20) structured on All Regents?
- Lithium from evaporation ponds to a carbonate reactor: percent by mass, moles, solubility curves, and ionic formulas. Practice the Lithium Carbonate from Desert Brine phenomenon cluster (Q16–Q20: 2 MC, 3 CR) from Independent Chemistry Practice Examination A (Physical Science: Chemistry). Covers Solutions, Stoichiometry and conservation, Bonding and formulas (HS-PS1-10, HS-PS1-7, HS-PS1-2) with the 2025 Reference Tables and scoring guide. Every question is worth 1 raw credit and pairs with the 2025 Edition Reference Tables, automatic multiple-choice key checking, and step-by-step constructed-response scoring guidance.
- Can I practice one phenomenon cluster at a time or sit the full exam?
- Yes. In the All Regents workspace you can launch any individual 4–6 question cluster in Learn mode (with strategy prompts) or sit the complete examination in Exam mode, then review every answer against the official-style scoring guide.