Stoichiometry
Mole <--> Ratio <--> Mole

* HINT Ratio = Finish / Start

Calculate the amount in mole of the substance directly above the question mark(?)

1.
+
+
2 moles

?
Finish

2
+
+
 
4 moles
?
Finish
3.
+
 
2 moles
?
Finish
4.
+
3
+
 
2 moles
?
Finish
5.
+
+
 
2 moles
?
Finish
6.
+
 
2 moles
?
Finish

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