Magnesium burns in air with a dazzling brilliance to produce magnesium oxide: 2mg (s) + o2 (g) → 2mgo (s) how many moles of o2 are consumed when 0.550 mol of magnesium burns?

Question

Ariana Stark

Chemistry

18 August, 14:33

Magnesium burns in air with a dazzling brilliance to produce magnesium oxide: 2mg (s) + o2 (g) → 2mgo (s) how many moles of o2 are consumed when 0.550 mol of magnesium burns?

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Answers (1)

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Yusuf Ritter · Answer 1

Answer is: 0,275 moles of oxygen are consumed.

Chemical reaction: 2Mg + O₂ → 2MgO.

n (Mg) = 0,550 mol.

n (O₂) = ?

from chemical reaction: n (Mg) : n (O₂) = 2 : 1.

0,550 mol : n (O₂) = 2 : 1.

2n (O₂) = 0,550 mol.

n (O₂) = 0,275 mol.

n - amount of substance.