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If Chelcy and Allyson reacted 2.55 grams of Mg with excess hydrochloric acid (HCl), how many grams of MgCl2 will they theoretically produce? Mg(s) + HCl (aq) → H2 (g) + MgCl2 (aq)

?g MgCl2

  • Chemistry -

    Mg + 2HCl ==> MgCl2 + H2
    mols Mg = grams/atomic mass.
    Using the coefficients in the balanced equation, convert mols Mg to mols mgCl2 (looks like 1:1 to me).
    Now convert mols MgCl2 to grams. g = mols x molar mass.

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