This chemistry question involves key chemical concepts and calculations. The detailed solution below walks through each step, from identifying the reaction type to computing the final answer.

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Welcome back Chikpa — missed you this week.
Here's a review of your answers:
2(a) Distinguish between a strong acid and a weak acid ✅ Correct. Your distinction is accurate.
2(b) IUPAC Names ✅ Correct. All the IUPAC names provided are accurate.
2(c)(i) Distinguish between renewable and non-renewable sources of energy ✅ Correct. Your distinction is accurate and concise.
2(c)(ii) Examples ✅ Correct. Both examples are appropriate for their respective categories.
3(a)(i) Why are the tips of needles pointed? ✅ Correct. Reducing the area of contact increases pressure, making piercing easier.
3(a)(ii) Why are wheels of earth-moving machines broad? ✅ Correct. Increasing the area of contact reduces pressure, preventing the machine from sinking.
3(b)(i) Distinguish between a base and an alkali ✅ Correct. Your distinction accurately defines a base and specifies that an alkali is a soluble base.
3(b)(ii) One natural source of each base ✅ Correct. All the natural sources listed are accurate.
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Welcome back Chikpa — missed you this week. Here's a review of your answers: 2(a) Distinguish between a strong acid and a weak acid ✅ Correct.
This chemistry question involves key chemical concepts and calculations. The detailed solution below walks through each step, from identifying the reaction type to computing the final answer.