Calculate the number of representative particles in 11.5 molecules of KBR

The number of representative particles in 11.5 moles of potassium bromide are 6.92 * 10²⁴ formula units of KBr.

Solution:

As we know that 1 mole of any substance exacly contains 6.022 * 10²³ particles. Mathematically;

Moles = Number of Particles : 6.022 * 10²³

Solving for Number of Particles,

Number of Particles = Moles * 6.022 * 10²³

Putting values,

Number of particles = 11.5 mol * 6.022 * 10²³ particles. mol⁻¹

Number of Particles = 6.92 * 10²⁴ formula units of KBr