What mass of Magnesium oxide (MgO) is produced when 12 g of Magnesium is burned in excess Oxygen? (Ar: Mg=24, O=16)
-
10 g
-
20 g
-
40 g
-
80 g
📝 Detailed explanation
Reaction: 2Mg + O₂ → 2MgO. Moles of Mg = 12 / 24 = 0.5 mol. According to stoichiometry, 0.5 mol Mg produces 0.5 mol MgO. Mass of MgO = 0.5 * (24 + 16) = 20 g.
← Previous
→ Next
Space — Show answer
🎯 Take a test on the topic «Variant #7 of the University Scholarship Examination»
This topic contains 50 questions.
Test your knowledge!
🔐 Log in to take the test
📚 All tests by subject «Bio+Chem»
View all collections and topics in Bio+Chem
Go to subject →
