Химия!!!!!!!!!!!!!!!!

Question

Химия!!!!!!!!!!!!!!!!

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Answer 1

Al(+3) S(-2)
Cr(-6) O(-2)
Mg(+2) Cl-2
H(+) S(-2)
Mn(+4) O(-2)
2:B2O3
KF
K3N.
3H2O2(-1)