determine the number of representative particles in each of the following and identify the representative particle: 11.5 mol Ag; 18.0 mol H20; 0.150 mol NaCL.

To determine the number of representative particles in each substance, we need to use Avogadro's number (6.022 x 10^23).

1. 11.5 mol Ag:
Since Ag represents the element silver, the representative particle is an atom of silver (Ag).
Number of representative particles = 11.5 mol x 6.022 x 10^23 particles/mol = 6.9243 x 10^24 representative particles.

2. 18.0 mol H2O:
H2O represents a molecule of water.
Number of representative particles = 18.0 mol x 6.022 x 10^23 particles/mol = 1.08516 x 10^25 representative particles.

3. 0.150 mol NaCl:
NaCl represents a molecule of sodium chloride (table salt).
Number of representative particles = 0.150 mol x 6.022 x 10^23 particles/mol = 9.033 x 10^22 representative particles.

So, the number of representative particles in each substance is:
- 11.5 mol Ag: 6.9243 x 10^24 representative particles of Ag
- 18.0 mol H2O: 1.08516 x 10^25 representative particles of H2O
- 0.150 mol NaCl: 9.033 x 10^22 representative particles of NaCl

To determine the number of representative particles in each of the given substances, we need to know Avogadro's number, which represents the number of particles, such as atoms, molecules, or ions, in one mole of a substance. Avogadro's number is approximately 6.022 x 10^23 particles per mole.

Now let's find the number of representative particles for each substance:

1. 11.5 mol Ag:
To determine the number of representative particles, we multiply the number of moles by Avogadro's number:
11.5 mol Ag × 6.022 x 10^23 particles/mol = 6.9203 x 10^24 particles

The representative particle for silver (Ag) is an atom of silver.

2. 18.0 mol H2O:
Again, multiply the number of moles by Avogadro's number:
18.0 mol H2O × 6.022 x 10^23 particles/mol = 1.0856 x 10^25 particles

The representative particle for water (H2O) is a molecule of water, which consists of two hydrogen atoms bonded to one oxygen atom.

3. 0.150 mol NaCl:
Once again, multiply the number of moles by Avogadro's number:
0.150 mol NaCl × 6.022 x 10^23 particles/mol = 9.033 x 10^22 particles

The representative particle for sodium chloride (NaCl) is an ion—specifically, a sodium ion (Na+) and a chloride ion (Cl-).

To summarize:
- 11.5 mol Ag contains approximately 6.9203 x 10^24 atoms of silver.
- 18.0 mol H2O contains approximately 1.0856 x 10^25 molecules of water.
- 0.150 mol NaCl contains approximately 9.033 x 10^22 ions of sodium chloride.