Question breakdown in A Stain and a Catalyst (Q26–Q30)
| Question | Response Type | Topic | NYSP12SLS Standard | Action |
|---|---|---|---|---|
| Question 26 | 1-credit Multiple Choice (4 options) | Thermochemistry | HS-PS1-4 | Solve in workspace → |
| Question 27 | 1-credit Multiple Choice (4 options) | Reaction rates | HS-PS1-5 | Solve in workspace → |
| Question 28 | 1-credit Constructed Response (rubric-scored) | Reaction rates | HS-PS1-5 | Solve in workspace → |
| Question 29 | 1-credit Multiple Choice (4 options) | Stoichiometry and conservation | HS-PS1-7 | Solve in workspace → |
| Question 30 | 1-credit Constructed Response (rubric-scored) | Thermochemistry | HS-PS3-1 | Solve in workspace → |
Other clusters in Chemistry Practice Examination · 113
| Questions | Cluster & Topics | Format | Practice |
|---|---|---|---|
| 1–5 | Heat for a SpacecraftPu-238 power for a climate satellite: nuclear equations, cross-linked wire insulation, and helium's electron arrangementNuclear chemistry · Materials and structure · Periodic patterns · Engineering design (HS-PS1-8, HS-PS2-6, HS-PS1-1, HS-ETS1-1) | 3 MC, 2 CR | Practice cluster |
| 6–10 | Glass Through Temperature ChangesBorosilicate glass warming water: boron vs aluminum trends, network covalent bonding, and liquid vs vapor waterPeriodic patterns · Bonding and formulas · Materials and structure · Intermolecular forces · Polarity and molecular structure (HS-PS1-1, HS-PS1-2, HS-PS2-6, HS-PS1-3, HS-PS3-5) | 3 MC, 2 CR | Practice cluster |
| 11–15 | Storing Air for Later UseCompressed-air energy storage: Boyle's law, pressure vs temperature at fixed volume, the combined gas law, specific heatGases · Stoichiometry and conservation · Thermochemistry (HS-PS1-9, HS-PS1-7, HS-PS3-1) | 3 MC, 2 CR | Practice cluster |
| 16–20 | Salt Left by the WaterConcentrating lake brine in the sun: percent by mass, dissociation equations, gas volume at STP, carbonate precipitatesSolutions · Stoichiometry and conservation · Bonding and formulas (HS-PS1-10, HS-PS1-7, HS-PS1-2) | 3 MC, 2 CR | Practice cluster |
| 21–25 | Acid Forms During FermentationLactic acid in a fermentation model: pH and hydronium ion concentration, proton donors and acceptors, and boiling pointAcids and bases · Solutions (HS-PS1-11, HS-PS1-10) | 3 MC, 2 CR | Practice cluster |
| 31–35 | Refining an Ammonia ProcessHaber–Bosch ammonia: removing product from equilibrium, mole ratios, Group 1 trends for promoters, and catalystsEquilibrium · Stoichiometry and conservation · Periodic patterns · Engineering design · Reaction rates (HS-PS1-6, HS-PS1-7, HS-PS1-1, HS-ETS1-3, HS-PS1-5) | 3 MC, 2 CR | Practice cluster |
| 36–40 | A Rechargeable Spacecraft BatteryHubble's nickel–hydrogen batteries: half-reactions, oxidation numbers, energy conversion, and water near K⁺ ionsOxidation and reduction · Materials and structure · Polarity and molecular structure (HS-PS1-12, HS-PS2-6, HS-PS3-5) | 3 MC, 2 CR | Practice cluster |
| 41–45 | Air Passing a Wet SurfaceEvaporative coolers: boiling points and intermolecular forces, heat lost by cooling air, mass percent, hydrogen bondingIntermolecular forces · Thermochemistry · Solutions · Polarity and molecular structure (HS-PS1-3, HS-PS3-1, HS-PS1-10, HS-PS3-5) | 3 MC, 2 CR | Practice cluster |
| 46–50 | Light for an Orbital GardenChoosing red and blue lamps for space lettuce: wavelength and frequency, classifying radiation, and photon energyElectromagnetic radiation · Photosynthesis · Engineering design (HS-PS4-4, HS-LS1-5, HS-ETS1-2) | 3 MC, 2 CR | Practice cluster |
Frequently asked questions
- How is A Stain and a Catalyst · Chemistry Practice Examination · 113 Chemistry Regents Cluster (Q26–Q30) structured on All Regents?
- A protease on a laundry stain: potential energy diagrams, temperature and collisions, mole ratios, and specific heat. Practice the A Stain and a Catalyst phenomenon cluster (Q26–Q30: 3 MC, 2 CR) from Chemistry Practice Examination · 113 (Physical Science: Chemistry). Covers Thermochemistry, Reaction rates, Stoichiometry and conservation (HS-PS1-4, HS-PS1-5, HS-PS1-7, HS-PS3-1) 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.