CHEMISTRY SHENANIGANS

-For monoatomic elements, a molecule= an element
-Diatomic element: Molecule (Cl2) Element (Cl)
-Molecules of Compounds H-O-H
--> molecule 2'H' atoms in 1 molecule, 1 'O' atom in 1 molecule
Example
Write ammonium carbonate (NH4)2CO3
N:2
H:8
O:3
C:1
Example
-moles<---->molecules
6.02x10^23 molec/1mol or 1mol/6.02x10^23molec

How many molecules are in 0.25 mol of CO2?
-0.25mol x 6.02x10^23molec/1mol = 1.505x10^23

5.1772x10^24 molecules of H2O = ? moles
-5.1772x10^24 molecules (1mol/6.02x10^23)=8.6mol

Find the number of 'H' atoms in 4.0mol of ammonia?(NH3)
- moles-->molecules--> H atoms
-4.0mol x 6.02x10^23/1mol= 2.41x10^24
-molecules x 3 = 7.22 x 10^24 'H" atoms