2Mg + O2 --> 2MgO

Question

Question

Whats the number of moles of oxygen gas needed to react with 4.0 moles of Mg is?

Answer 1

Answer #1

the molar ratio of Mg : O2 = 2 : 1
the moles of O2 = moles of Mg / 2 = 4.0 / 2 = 2.0 mol

answered by: DrBob222

Answer 2

Answer #2

Since balanced equation on left in Mg + O2 ==> MgO
You need one mol of O2, so 2.0 moles

answered by: Reham

Answer 3

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