Question 1

  1. 6, 6, 1, 6
  2. Alcohol
  3. c
  4. mixture
  5. c, b, a
  6. / measurement

Question 2

  1. 7

  2. We would need to decrease the pH and add sulfuric acid to make the soil more acidic and grow blue flowers

  3. Mr = CaCO3

    40 + 12 + (3 x 16) = 100g/mol

  4. H2O, CO2

  5. CaSO4

  6. 7

Question 3

  1. N2 + O2 → 2NO
  2. / diagram of gas
  3. They move at high speeds in random directions due to high energy and weak bonds.
  4. This is due to diffusion. When the tractor emits NO gas, it is at high concentration near it source. Over time, the particles move from high concentration to low concentration and pollute a large area.

Question 4