Even Hunter Shumber can’t solve this.

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Across
  1. 6. H2SO4.
  2. 9. C2H5OH used as a solvent or in gasoline
  3. 12. C6H12O6
  4. 13. CN.
  5. 14. AgNO3.
  6. 15. C12H22O11 Flavor enhancer(sweet)
  7. 18. H2O2 used to clean wounds on skin.
  8. 19. C8H8 used for packing boxes
  9. 20. CaCL2.
Down
  1. 1. HF
  2. 2. NaC2H3O2.
  3. 3. H2SO4.
  4. 4. C3H8O3 improving athletic performance
  5. 5. K2CrO4.
  6. 7. NaHCO3
  7. 8. NH4Cl.
  8. 10. CH3COOH
  9. 11. C5H6OS treatment of hyperthyroidism
  10. 16. Ba(NO3)2.
  11. 17. C6H1206