Question

How many grams of magnesium chloride should be produced by the single displacement reaction between 0.578 grams of magnesium metal and an excess hydrochloric acid?
See your other post on Al and O2.
I want to make sure I have the correct double replacement formula.
would it be
HNO3 + Al2O3 ---> Al(NO3)3 + H3O?
wrong formula, would it be...
MgCl2 ---> Mg + HCl
reverse that and balance.
Mg + 2HCl ==> MgCl2.

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