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What are the answers to the following homework questions: 1. Importance of Practising Safety in the lab 2. Meaning of terms (Soot, Luminous Flame, Bunsen burner) 3. Consumer Protection when handling a

Chemistry

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Here are the answers to your homework questions.

1. Importance of Practising Safety in the lab

  • Prevents accidents and injuries.
  • Ensures accurate experimental results by minimizing contamination or errors.
  • Protects laboratory equipment and facilities from damage.

2. Meaning of following terms

  • Soot: A black powdery or flaky substance consisting of amorphous carbon, produced by the incomplete combustion of organic matter.
  • Luminous Flame: A yellow, flickering flame produced when a Bunsen burner's air hole is closed, indicating incomplete combustion due to insufficient oxygen. It is cooler and deposits soot.
  • Bunsen burner: A common piece of laboratory equipment that produces a single open gas flame, used for heating, sterilization, and combustion.

3. How is Consumer Protected when handling apparatus and Chemical (Give 3 ways)
Consumers are protected by:

  • Clear labeling: Products must have labels detailing contents, hazards, and safe handling instructions.
  • Safety data sheets (SDS): For chemicals, these provide comprehensive information on properties, hazards, and emergency procedures.
  • Regulatory standards: Governments set standards for product design, manufacturing, and testing to ensure safety and quality.

4. Abdul measure his body temperature as 37∘C37^\circ\text{C}. What is his temperature in Kelvin?

  1. Recall the formula for converting Celsius to Kelvin.

    TK=TC+273.15T_K = T_C + 273.15
  2. Substitute the given temperature in Celsius into the formula.

    TK=37∘C+273.15T_K = 37^\circ\text{C} + 273.15
  3. Calculate the temperature in Kelvin.

    TK=310.15 KT_K = 310.15 \text{ K}

    Abdul's temperature in Kelvin is 310.15 K\boxed{\text{310.15 K}}.

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