Angles are not dimensionless.
No, but an angle is dimensionless.
No, a dimensionless quantity does not have a unit because it represents a pure number without any physical dimension. Examples of dimensionless quantities include ratios, proportions, and mathematical constants.
If a quantity is "dimensionless", that means it has no units, and it's just a number.
The unit for the equilibrium constant is dimensionless.
It is a dimensionless parameter since its just a ratio between two quantities of same unit.
A dimensionless unit - an integer (or counting number)!
The unit of the equilibrium constant in a chemical reaction is dimensionless.
Relative permeability does not have a unit as it is a dimensionless quantity that describes how easily a fluid can flow through a porous medium (such as a rock or soil) relative to the fluid's flow in a vacuum. It is typically represented as a dimensionless ratio ranging from 0 to 1.
From the Wikipedia article about the radian: "The unit was formerly a SI supplementary unit, but this category was abolished in 1995 and the radian is now considered a SI derived unit." The radian can be derived as the ratio between two lengths. That makes it a dimensionless unit.
The coefficient of friction is dimensionless.
The unit for pH in a solution is a dimensionless unit that measures the acidity or basicity of a solution on a scale from 0 to 14.
It is a dimensionless parameter to measure countercurrent sorption operations