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1

Moles definition

- molecular mass inn grams.
- avagandros number of molecules in a pure substance.

2

Avagandros number

6.023 X 10(23) atoms

3

Electrolysis

-Separates a ionic solution in liquid or aqueous form.
-anions —> anode
-cations —>cathode.

4

Anion

-

5

Cation

+

6

Anode

+

7

Cathode

-

8

Power source of electrolysis

DC

9

Why preform electrolysis

-Coats things in metal.
-purifies elements.

10

Imperial formular

This is the simplest ratio of elements in a compound.

11

Oxidation

Loss of electrons, from negative charge to neutral.

12

Reduction

Gain of electrons. Loss of posertive charge.

13

The Harber process

N2 + (3)H2 = (2)NH3
- nitrogen gained from fractional distillation with air.
- Hydrogen from natural gas or water electrolysis
- ammonium used to replenish soil neutriants