Search for a calculation error.
Negative feedback usually regulates hormone concentrations in the blood.
No, equilibrium concentrations cannot be negative. Concentration represents the amount of a substance in a given volume, and it is defined as a non-negative value. In chemical systems, equilibrium concentrations reflect the balance between reactants and products, and negative values would not have a physical meaning in this context.
no by negative feedback
No. An equilibrium constant is derived from the products, powers, and ratios of the activities (essentially the concentrations) of the species that are in equilibrium. Since there is no such thing as a negative concentration, there is no way their products, powers or ratios can yield a negative number.
C.
An electrolytic cell
an equal number of H3O+ ions and OH- ions
It is the ratio of the concentrations of products to the concentrations of reactants.
It is the ratio of the concentrations of products to the concentrations of reactants.
Diffusion
These concentrations are supposed to be equal.
In high solute concentrations water will flow out of the cell. In low solute concentrations water will flow into the cell.