9. convert each of the following from mole to number of particles.\na.) 32.45 mol cr₃(po₄)₂ = ____________…

Explanation:

Step1: Recall Avogadro's number

Avogadro's number ($N_A$) is $6.022\times 10^{23}$ particles per mole.

Step2: Calculate for $Cr_3(PO_4)_2$

To find the number of formula - units of $Cr_3(PO_4)_2$, multiply the number of moles by Avogadro's number. Number of formula units $=32.45\ mol\times6.022\times 10^{23}\ formula\ units/mol$ $=32.45\times6.022\times 10^{23}$ $ = 1.954039\times10^{25}$ formula units

Step3: Calculate for Rn

To find the number of Rn atoms, multiply the number of moles of Rn by Avogadro's number. Number of Rn atoms $=21.7\ mol\times6.022\times 10^{23}\ atoms/mol$ $=21.7\times6.022\times 10^{23}$ $=1.306774\times 10^{25}$ atoms

Answer:

a. $1.954039\times 10^{25}$ formula units $Cr_3(PO_4)_2$ b. $1.306774\times 10^{25}$ Rn atoms