Two moles of magnesium (Mg) and five moles of oxygen (O2) are placed in a reaction vessel. When magnesium is ignited, it reacts with oxygen.

What is the limiting reactant in this experiment?
Mg + O2 d MgO (unbalanced)

Mg

O2

MgO

Both reactants are in same proportion

Question

Two moles of magnesium (Mg) and five moles of oxygen (O2) are placed in a reaction vessel. When magnesium is ignited, it reacts with oxygen. 

What is the limiting reactant in this experiment?
Mg + O2 d MgO (unbalanced)

Mg

O2

MgO

Both reactants are in same proportion

anonymous · Answer

@Rushwr  @Photon336

anonymous · Answer

@cliffordtapp

rushwr · Answer

@whateven 1st u have to balance the equation:
$$2Mg + O _{2} \rightarrow 2MgO$$
According to the equation we can say that 2 moles of Mg will react with 1 mole of Oxygen. 
To react with 2 moles of Mg we only need 1 mole of oxygen, but we have 4 moles of oxygen right? Therefore we can say that O2 is in excess and Mg is the limiting agent.

anonymous · Answer

Okay that makes sense :) So then we would say A yes?