1. Make the new product 2. Look at the charges on the table to determine if subscripts are needed.
3. If needed, use coefficients to balance out the reaction
a. Always check for diatoms elements in decomposition and single replacement reactions
b. The list of the diatomics are at the end of this document.

18. A synthesis reaction of Aluminum and Sulfur
Al + S à

19. The decomposition of Potassium oxide
Li2Oà

20. The combustion of propane gas
C3H8 + O2à

21. A single replacement reaction of Potassium metal and Silver chloride.
K + AgCl à

22. A double replacement reaction of Sodium sulfate and Potassium iodide
Na2SO4 + KI à

Ion Charges table
+1 ions +2 ions +3 ions -1 ions -2 ions
Na Mg Al I O
Li Ca Cl S
KSO4
Ag

List of Diatomic Elements
O2
Cl2
H2
Br2
N2
I2

F2

18

Explanation:

because I did this test and I hot it wrong and this is right

i'm wiling to try and you : )

it can be observed without changing the identity of the object.

it depends on what substance you're talking about as well as many other factors. in quantum mechanics, the observation of particles affects the observers ability to measure certain properties. for example: you can know the velocity of a particle, but you can't know it's position; or you can know it's position, but not it's velocity. it's like trying to find out where a grain of sand is by throwing other grains of sand at it. once you find out where it is, it's been moved. it's also like trying to find an answer to the question of whether or not a tree falling in a forest makes a sound if nobody is there to hear it. paradoxically, the only way to find out is to be there and hear it.