Exhibit 5-1 Consider the Reaction of Magnesium with Oxygen to Form

question 43

Multiple Choice

Exhibit 5-1 Consider the reaction of Magnesium with oxygen to form magnesium oxide and heat as shown below to answer the following problem(s) :
-2 Mg (s) + O₂ (g) →2 MgO (s) D H ° _rxn = - 1204 kJ
Refer to Exhibit 5-1. How many grams of MgO are produced during an enthalpy change of - 96.0 kJ?
Molar Mass(MgO) = 40.3 g/mol

• A) 1010 g
• B) 6.43 g
• C) 3.21 g
• D) 0.311 g
• E) None of these

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