I suppose you will get 2-phase liquid: antifreeze at the bottom and gasoline at the top.
No...mixing styrofoam and gasoline makes napalm.
A pint or less mixing with a full tank of gasoline, nothing will happen.
If the Blazer is gasoline powered the antifreeze can be any kind that is for sale for gasoline powered vehicles.
A bad head gasket is the most common cause of antifreeze mixing in the oil. The antifreeze will dilute the oil and it will eventually cause your engine to seize up.
A 50% water 50% antifreeze is recommended.
Carbon
NO.
Mixing Carbon Dioxide (fills fire extinguishers) with Gasoline will prevent ignition. So nothing
Antifreeze, Pesticide then Gasoline. Antifreeze has to weigh right at as much as water to make sure they mix in the cooling system - no bubbling up. Pesticides are made from materials lighter than water but mixed with water as a medium, so they are lighter than antifreeze. Gasoline is very light (the lighter the fuel with the same energy content, the more efficient it is), it' lighter than water so it's definitely lighter than antifreeze. Since pesticides are mostly water, in all likelihood gasoline is lighter than the pesticides.antifreeze > pesticides > gasoline
You may have a head gasket problem or a cracked head, engine oil is mixing with the antifreeze.
carbon
Could be oil mixing with antifreeze indicating a bad head gasket Are you losing motor oil?