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What numbers go in the blanks below, in order from left to right,

/in /by

What numbers go in the blanks below, in order from left to right, to balance this chemical equation?

___ FeH2 + ___H2SO4 –> ___Fe2(SO4)3 + ___H2O

A.1,2,3,4
B.3,3,2,1
C.1,1,1,1
D.2,3,1,3

 
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