When magnesium (mg) metal is placed in hydrochloric acid (hcl), it forms magnesium chloride

When magnesium (mg) metal is placed in hydrochloric acid (hcl), it forms magnesium chloride (mgcl2) and a gas. what gas is formed in this reaction?

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  1. answer: enthalpy

    explanation:

    for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

    [tex]\delta h=e_p-e_r[/tex]

    [tex]\delta h[/tex]= enthaply

    [tex]e_p[/tex] = energy of products

    [tex]e_r[/tex] = energy of reactants

    as [tex]e_p< e_r[/tex], thus [tex]\delta h[/tex] comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.

  2. Magnesium in hydrochloric acid forms H2 (hydrogen) gas according to the balanced chemical equation:
    Mg + 2HCl→H2 + MgCl2

  3. odds are decent that your handwriting right now looks a little bit different than it did five years ago, and will look different again in five more. when i look back through my notebooks from middle school to now, i see a long, slow progression from meticulous and teeny letters to bigger, sloppier ones, plus a few side detours: sometime in high school, for example, i decided those loopy cursive lowercase f’s were just the coolest, adopting them as the lone rep for cursive in my otherwise all-print handwriting.

    explanation:

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