Related Questions

  1. Heat of combustion ΔH for C(s) , H₂(g)and CH₄(g) are -94, -68 and -213 kcal/mol.
  2. Helium is used in balloons in place of hydrogen because it is
  3. Four successive members of the first series of the transition metals
  4. In the manufacture of cement which of the following is used
  5. He₂ does not exist because its