In the expression \\( \\Delta t=i \\times k f \\times \\mathrm{m} \\), what is the ' \\( \\mathrm{i} \\) ' called?
A) The van't Hoff factor
B) The number of moles of solute particles that exists in \\( \\mathrm{m} \\)
C) The product of the rate constant \\( k f \\) and the molar concentration \\( \\mathrm{m} \\)
D) The change in time caused by the reaction