Answer to Question #99790 in General Chemistry for Jared Freeman

Question #99790
How many grams of magnesium are needed to prepare 4.60 L of H2 at 760 mmHg and 28 ∘C?
1
Expert's answer
2019-12-03T08:26:59-0500

"Mg+ 2HCl\\to MgCl_2+H_2"


Moles of Hydrogen gas obtained ="\\frac{4.6}{22.4}=0.205\\ mole"

Moles of Mg required = 0.205 moles

Mass of Mg required = "0.205\\times 24.3= 5\\ gm"



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