Keystone Academy

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💢 Keystone Academy 😎 📚 Your survival guide for grades 9-12! 📝 Notes, study hacks, exam tips & motivation. 🔔 Turn on notifications – your future self will thank you. 👇 Join the squad: @Keystoneaca

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收录于 2026-10-20

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🔥 SAT ANALOGY — 10 NEW QUESTIONS FRAGILE : BREAK :: A) Elastic : Stretch B) Heavy : Lift C) Sharp : Cut D) Wet : Dry OMNIVOROUS : FOOD :: A) Aquatic : Water B) Nocturnal : Darkness C) Voracious : Appetite D) Herbivorous : Plants INSOMNIA : SLEEP :: A) Amnesia…

2026-10-18 02:40 👁 25 👍 0 💬 0 ↗ 2

Chemistry Grade 12 Unit 1: Acid-Base Equilibrium 21. Which of the following salts will produce an acidic solution when dissolved in water? A. NH₄Cl B. NaNO₃ C. KCH₃COO D. Na₂SO₄ Answer: A Explanation: NH₄Cl is a salt of a strong acid (HCl) and a weak base (NH₃…

2026-10-06 20:10 👁 95 👍 0 💬 0 ↗ 3

Chemistry Grade 12 Unit 1: Acid-Base Equilibrium 11. What is the pOH of a solution with a hydrogen ion concentration [H⁺] of 1.0 × 10⁻⁹ M at 25 °C? A. 9 B. 7 C. 5 D. 4 Answer: C Explanation: First, find the pH: pH = -log(1.0 × 10⁻⁹) = 9. Since pH + pOH = 14 at…

2026-10-06 20:10 👁 60 👍 0 💬 0 ↗ 3

Chemistry Grade 12 Unit 1: Acid-Base Equilibrium 1. According to the Arrhenius concept, an acid is defined as a substance that: A. produces H⁺ ions in aqueous solution B. donates a proton to another substance C. accepts an electron pair D. produces OH⁻ ions in…

2026-10-06 20:10 👁 37 👍 0 💬 0 ↗ 2

Extreme Series New Curriculum Subject Biology Grade 11 and 12 https://t.me/ExtremeSeries https://t.me/ExtremeSeries ◢◤◢◤◥◣ █ Add All █ ◥◣◥◣◢◤

2026-10-01 13:26 👁 33 👍 0 💬 0 ↗ 0

New Curriculum Extreme Series Subject Physics Grade 11 https://t.me/ExtremeSeries https://t.me/ExtremeSeries ◢◤◢◤◥◣ █ Add All █ ◥◣◥◣◢◤

2026-10-01 13:26 👁 28 👍 0 💬 0 ↗ 0

Extreme Series New Curriculum Subject Mathematics Grade 11 and 12 https://t.me/ExtremeSeries https://t.me/ExtremeSeries ◢◤◢◤◥◣ █ Add All █ ◥◣◥◣◢◤

2026-10-01 13:26 👁 34 👍 0 💬 0 ↗ 1

Extreme Series New Curriculum Subject Chemistry Grade 11 and 12 https://t.me/ExtremeSeries https://t.me/ExtremeSeries ◢◤◢◤◥◣ █ Add All █ ◥◣◥◣◢◤

2026-10-01 13:26 👁 29 👍 0 💬 0 ↗ 0

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