6. 2NH3 = N2 + 3H2
Reactant. Product
N = (1) 2. N = 2
H = (3) 6 H = (2) 6
Note: The parenthesis () means "cancel". Because I can't cancel the number in keyboard. So that I used parenthesis.
Reaction Type : Decomposition
Because the single compound has been break down into 2 product.
7. 6KOH + Co3(PO4)2 = 2K3PO4 + 3Co(OH)2
Reaction Type : Double Replacement
8. Fe3O4 + 4H2 = 3Fe + 4H2O
Reaction Type: Single Replacement
Reactant. Product
Fe = 3 Fe = 1 (3)
O = (4) 12 O = (2) 12
H = (2) 8 H = 8
