For a first order reaction, the ratio of the time for 75% completion of a reaction to the time for 50% completion is ____________. (Integer answer)

The number of hydrogen bonded water molecule(s) associated with stoichiometry CuSO₄.5H₂O is ____________.

According to the following figure, the magnitude of the enthalpy change of the reaction

A + B $$\to$$ M + N in kJ mol^$$-$$ is equal to ___________. (Integer answer)

Ge(Z = 32) in its ground state electronic configuration has x completely filled orbitals with m_l = 0. The value of x is ___________.