Researchers can use a metric called the particle number concentration (PNC) to calculate the number of particles in a sample, ...

Question 100 cm 3 of dilute hydrochloric acid contains 0.5 g of dissolved hydrogen chloride. Calculate the concentration of the acid in g dm -3.

Yuxi Zheng, Concentration in Sequences of Solutions to the Nonlinear Klein-Gordon Equation, Indiana University Mathematics Journal, Vol. 40, No. 1 (Spring, 1991), pp. 201-235 ...

The concentration ratio, in economics, is a ratio that indicates the size of firms in relation to their industry as a whole.