Question

Compare and contrast the number of representative particles and the mass of UF6 with the number of representative particles and mass of CCl3CF3. Explain any differences you observe.

Answer 1

A representative particle is the smallest unit of a specific substance that can be found in nature. These are typically in forms of atoms. However, may also be in compounds, etc. The number of representative particle of UF6, I believe is 1 with a molar mass of 352.02 g/mol same with CCl3CF3 with a mass of 187.35 g/mol. 

Answer 2

Answer:

$Particles_{UF_6}=3.85x10^{23}particles\\\\Particles_{CCl_3CF_3}=6.43x10^{23}particles$

Explanation:

Hello,

In this case, since the given masses of UF6 and CCl3CF3 are 225 g and 200 g respectively (missing information) if we want to compare and contrast the number of representative particles both the molar mass for those compounds (352.02g/mol and 187.3756g/mol respectively) and the Avogrado's number must be used as follows:

$Particles_{UF_6}=225g*\frac{1molUF_6}{352.02gUF_6}*\frac{6.022x10^{23}particles}{1molUF_6}=3.85x10^{23}particles\\\\Particles_{CCl_3CF_3}=225g*\frac{1molCCl_3CF_3}{187.3756gCCl_3CF_3}*\frac{6.022x10^{23}particles}{1molCCl_3CF_3}=6.43x10^{23}particles$

In such a way, one sees that since it is about different compounds having different molar masses, but in order to know the number of representative particles, the same Avogadro's number is used, the results are quite different and is evident just by the simple fact that they are different compounds.

Best regards.