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brianna
brianna asked in Science & MathematicsChemistry · 9 years ago

Chemistry ? Help plz :(?

Given the equation Mg(OH)2+HCl---> MgCl2+2H20 , if 33.5 g of Mg(OH)2 react , what mass of H2O could be produced ?

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  • Randy Ham
    Lv 4
    9 years ago
    Favorite Answer

    Molecular Mass of Mg(OH)2 = 58.3g/mol

    Molecular Mass of H20 = 18g/mol

    33.5g / 58.3g/mol = 0.5746moles of Mg(OH)2

    From our balanced equation for every 1 mole of Mg(OH)2 there are 2 moles of H20. Therefore we have

    0.5746moles * 2 = 1.149moles of H20.

    1.149moles * 18g/mol = 20.69grams of H2O

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