Answered on
To determine the number of atoms in a given amount of substance, you can use Avogadro's constant, which is approximately 6.022×1023 mol−1
6.022×1023
mol−1
. This constant represents the number of entities (atoms, molecules, ions, etc.) in one mole of a substance.
Given that you have 0.10 mol
0.10mol of PtCl2(NH3)2
PtCl2
(NH3
)2
, you can use Avogadro's constant to find the number of molecules and then multiply by the number of atoms in one molecule.
Number of molecules= moles × Avogadro’s constant
Number of molecules=moles×Avogadro’s constant
Number of atoms=Number of molecules×Number of atoms per molecule
Number of atoms=Number of molecules×Number of atoms per molecule
The formula PtCl2(NH3)2
PtCl2
(NH3)2
indicates that there are 1 platinum (Pt) atom, 2 chlorine (Cl) atoms, and 4 nitrogen (N) atoms in each molecule.
So, for PtCl2(NH3)2
PtCl2
(NH3)2
, there are 1+2+4=7
1+2+4=7 atoms in one molecule.
Now, plug in the values:
Number of molecules=0.10 mol×6.022×1023 mol−1
Number of molecules=0.10mol×6.022×1023
mol−1
Number of atoms=Number of molecules×7
Number of atoms=Number of molecules×7
Calculate these values to find the number of atoms in 0.10 mol
0.10mol of PtCl2(NH3)2
PtCl2
(NH3)2
.