Que son fórmulas químicas
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dont know if you asking to translate or not but here is a translation from spanish to english:

in english: what are chemical formulas

the answer in english is: a mathematical relationship or rule expressed in symbols.

in spanish: una relación o regla matemática expresada en símbolos.

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.