Is spring constant a dimensionsless constant?

Is spring constant a dimensional or non-dimensional quantity?

The masses m_1 and m_2 together are suspended from a massless spring of constant k. When masses are in equilibrium, m_2 is removed without disturbing the system. Find the amplitude of oscillation and angular frequency of m_1

What is dielectric Constant?

The rate constant depends on

What is spring constant ? What are the SI units?

Define decay constant.

Define molar depression constant