To calculate the mass of a higher number of moles, or even calculate the number of moles in a certain mass, a formula triangle can be used. Using the formula triangle is straightforward.

{{volume}}\) \(volume = \frac{{no.\,of\,moles}}{{concentration}}\) Calculate the concentration of the solution formed when 0.25 moles of potassium nitrate are dissolved in 500 cm 3 of water.