1.쉬움
According to the Arrhenius definition, what does a base produce in water?
- AHydrogen ions (H⁺)
- BHydroxide ions (OH⁻)
- CChloride ions (Cl⁻)
- DCarbonate ions (CO₃²⁻)
2.쉬움
How is percent yield calculated?
- A(Actual yield ÷ theoretical yield) × 100
- B(Theoretical yield ÷ actual yield) × 100
- C(Mass of reactants ÷ mass of products) × 100
- DActual yield − theoretical yield
3.쉬움
According to the Arrhenius definition, what does an acid produce in water?
- ASodium ions (Na⁺)
- BHydroxide ions (OH⁻)
- COxide ions (O²⁻)
- DHydrogen ions (H⁺)
4.보통
When diluting a concentrated acid, which method is safe?
- AAdd the water slowly to the acid
- BAdd the water quickly to the acid
- CAdd the acid slowly to the water
- DMix them in any order, as long as it is fast
5.보통
Nitric acid (HNO₃) reacts with potassium hydroxide (KOH). Which salt forms?
- ANitrogen hydroxide, NOH
- BPotassium nitrate, KNO₃
- CPotassium nitrite, KNO₂
- DPotassium hydride, KH
6.보통
How many molecules are in 2 mol of carbon dioxide?
- A2.00 × 10²³
- B3.01 × 10²³
- C6.02 × 10²³
- D1.20 × 10²⁴
7.어려움
포도당 C₆H₁₂O₆ 한 분자에는 원자가 몇 개 들어 있나요?
- A18개
- B72개
- C24개
- D3개
8.어려움
In the reaction NH₃ + H₂O ⇌ NH₄⁺ + OH⁻, which substance acts as the Brønsted–Lowry acid?
- ANH₄⁺ only
- BOH⁻
- CH₂O
- DNH₃
정답표
- 1. B · Hydroxide ions (OH⁻)
- 2. A · (Actual yield ÷ theoretical yield) × 100
- 3. D · Hydrogen ions (H⁺)
- 4. C · Add the acid slowly to the water
- 5. B · Potassium nitrate, KNO₃
- 6. D · 1.20 × 10²⁴
- 7. C · 24개
- 8. C · H₂O
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