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  1. K

    Chemistry: Post your doubts here!

    2.40 g of propan-2-ol were mixed with excess acidified potassium dichromate( VI ). The reaction mixture was then boiled under reflux for twenty minutes. The organic product was then collected by distillation. The yield of product was 75.0%
  2. K

    Chemistry: Post your doubts here!

    When 3.00 g of an anhydrous nitrate of a Group II metal is decomposed, 1.53 g of gas is produced.
  3. K

    Chemistry: Post your doubts here!

    Metaldehyde, (CH 3 CHO) 4 , is used as a solid fuel for camping stoves. The equation for the complete combustion of metaldehyde is shown. (CH 3 CHO) 4 (s) + 10 O 2 (g) → 8CO 2 (g) + 8H 2 O(l) = standard enthalpy change of combustion. Which expression will give a correct value for the enthalpy...
  4. K

    Chemistry: Post your doubts here!

    Phosphorus forms a compound with hydrogen called phosphine, PH 3 . This compound can react with a hydrogen ion, H + . Which type of interaction occurs between PH 3 and H + ? (9701/12/m/j/15)
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