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Chemistry · Oct / Nov 2023 · Paper 12 · Question 8

5070The mole and the Avogadro constant

One volume of a gaseous element, X2, combines with an equal volume of gaseous hydrogen to form two volumes of a gaseous hydride. What is the formula for the hydride of X?

  1. AH2X
  2. BHX
  3. CHX2
  4. DH2X2

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Correct answer: B. HX

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