How many molecules are present in 3.09 mol of silicon dioxide, SiO2

There are 1.86 x 10²⁴ molecules of Silicon dioxide, SiO₂

The mole is the number of particles(molecules, atoms, ions) contained in a substance

Moles can also be determined from the amount of substance mass and its molar mass

1 mol = 6.02.10²³  particles

Can be formulated

N = number of particles

n = mol

No = Avogadro's = 6.02.10²³

3.09 mol of Silicon dioxide, SiO₂

n=mol=3.09

answer: the rate of diffusion increases with increase in temperature.

increase in temperature, increases the molecular/particles speed (kinetic energy. diffusion means movement of particles through the material.

generally, the heavier the particle the more it interacts with the environment and more the temperature matters. so higher temperature results in higher diffusion.