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261.3. Air composition and usage(reactions).

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In chemistry doing the synthesis of the substance, that is sensitive against the air/ the moisture, it is done in the argon's inerted atmosphere inerted atmosphere
Air and its quality.
Air composition and usage(reactions).

Solve tasks to find hidden Geo point coordinates

  1. Geometry: Figure heights. Same sized figure areas.
  2. Geometry: Figure heights. Area of equivalent figures.
  3. Algebra: Relative frequency
  4. Geometry: Trapeze, its elements, types of trapeze, trapeze properties, isosceles trapeze signs.
  5. Geometry: Circle, their elements. Secant.
  6. Physics: Light break and lens.
  7. Algebra: Square root extraction
  8. Algebra: Incomplete quadratic equation
  9. Geometry: Parallelogram, elements. Properties and signs.
  10. Physics: Heat process in life.