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?

Answer 1

See your other post on Al and O2.

Answer 2

I want to make sure I have the correct double replacement formula.
would it be

Answer 3

HNO3 + Al2O3 ---> Al(NO3)3 + H3O?

Answer 4

wrong formula, would it be...
MgCl2 ---> Mg + HCl

Answer 5

reverse that and balance.
Mg + 2HCl ==> MgCl2.