info@ormalearn.com   +254721524786

Answers section



Questions 4.1c

  1. Which component of air will be:
    1. the first to liquefy during cooling ------------------------
    2. the last to liquefy during cooling --------------------------
    3. the first to boil during distillation --------------------------------
  2. Search the Internet for --------------------------------------------
    1. two uses of helium -----------------------------------------------
    2. one use of argon ---------------------------------------------
    3. one use of neon --------------------------------------------
    4. one use of carbon (IV) oxide -----------------------------------


Answers to Questions 4.1c

  1. So that any unreacted air is forced to flow over copper turnings to react with them.
  2. Copper (II) oxide
  3. Percentage of air used = [(V1-V2)/V1)]x100
  4. Volume of air in the combustion tube is not known. Some oxygen may remain unreacted, especially if copper turnings are not adequate.
  5. Copper + Oxygen Copper (II) oxide