Answer:
To solve this question regarding the mass percentage of Mg in the compound, follow these steps:
Step 1: Calculate the Total Mass of the Compound
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Moles of Mg = 0.6 mol
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Molar mass of Mg = 24 g/mol
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Mass of Mg = 0.6 mol × 24 g/mol = 14.4 g
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Moles of N = 0.4 mol
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Molar mass of N = 14 g/mol
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Mass of N = 0.4 mol × 14 g/mol = 5.6 g
Total mass of the compound = Mass of Mg + Mass of N = 14.4 g + 5.6 g = 20 g.
Step 2: Calculate the Mass Percentage of Mg
- Mass percentage of Mg = (Mass of Mg / Total mass of the compound) × 100
- Mass percentage of Mg = (14.4 g / 20 g) × 100 = 72%
Final Answer:
The mass percentage of Mg in the compound is 72%.