The given example is a chemical reaction.
The contents (separated as reactants and products) :

The written reaction is :

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Answer:
52.5 mol O2
Explanation:
4 FeCl3 + 6 O2 -> 2 Fe2O3 +6 Cl2
4 mol FeCl3 -> 6 mol O2
35.0 mol FeCl3 -> x
x= (35.0 mol FeCl3 * 6 mol O2)/4 mol FeCl3
x=52.5 mol O2
Answer:
bromine is a liquid non metal...
Answer:
0.0102 mole
Explanation:
Use and solve proportions for these with x as the unknown value.