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You do this For EX: _HCl + _MgO -> _H2O + _MgCl2

Mg-1 H-2

Coefficient O-1 Mg-1

| H-1 Cl-1

V Cl-1 O-1

EX: 2HCl + MgO -> H2O + MgCl2

Mg-1 H-2

O-1 Mg-1

H-2 -- Cl-2

Cl-2 --Mark out O-1

out and replace And then your done....

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11y ago

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