1.5 mole of O2 combine with Mg to form Mgo.The mass of Mg that has combined is?
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Answered by
10
2Mg +O₂ -----------> 2MgO
No. of moles of O₂ = 1.5
From the balance reaction, we can see, 2 moles of Mg reacts with 1 mole of O₂ to form 2 mole of MgO
That means, 1.5 moles of O₂ will react with (2×1.5) = 3 moles of Mg to form 3 moles of MgO
Atomic mass of Mg = 24 g
no. of moles = Mass/Atomic weight
⇒mass = no. of moles× Atomic weight
= 3×24 = 72 g
No. of moles of O₂ = 1.5
From the balance reaction, we can see, 2 moles of Mg reacts with 1 mole of O₂ to form 2 mole of MgO
That means, 1.5 moles of O₂ will react with (2×1.5) = 3 moles of Mg to form 3 moles of MgO
Atomic mass of Mg = 24 g
no. of moles = Mass/Atomic weight
⇒mass = no. of moles× Atomic weight
= 3×24 = 72 g
Answered by
83
Answer:
Explanation:
2Mg + O2 -----> 2MgO
2 Gram atoms of Mg reacts with 1 Gram Molar of Oxygen ie.,
(2 x 24) gm of Mg reacts with 32 gm of Oxygen 32 gm of O2 reacts with= 48 gm of Mg
3 moles of Mg = 24.31 × 3 = 72.93 g
Hence, 1.5 mole Oxygen required 72.93 g of Mg
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